EarthTrends (http://earthtrends.wri.org) Searchable Database Results
Provided by the World Resources Institute (http://www.wri.org)
"Water Resources and Freshwater Ecosystems -- Internal Renewable Water Resources (IRWR): Dependency ratio"

"Units: Percent (%)"

,,1960-2007,
Country
"Afghanistan","AFG",15,
"Albania","ALB",36,
"Algeria","DZA",3,
"Andorra","AND",0,
"Angola","AGO",0,
"Antigua and Barbuda","ATG",0,
"Argentina","ARG",66,
"Armenia","ARM",14,
"Australia","AUS",0,
"Austria","AUT",29,
"Azerbaijan","AZE",73,
"Bahamas","BHS",0,
"Bahrain","BHR",97,
"Bangladesh","BGD",91,
"Barbados","BRB",0,
"Belarus","BLR",36,
"Belgium","BEL",34,
"Belgium/Luxembourg","",39,
"Belize","BLZ",14,
"Benin","BEN",61,
"Bhutan","BTN",0,
"Bolivia","BOL",51,
"Bosnia and Herzegovina","BIH",5,
"Botswana","BWA",80,
"Brazil","BRA",34,
"Brunei Darussalam","BRN",0,
"Bulgaria","BGR",1,
"Burkina Faso","BFA",0,
"Burundi","BDI",20,
"Cambodia","KHM",75,
"Cameroon","CMR",4,
"Canada","CAN",2,
"Cape Verde","CPV",0,
"Côte d'Ivoire","CIV",5,
"Central African Rep","CAF",2,
"Chad","TCD",65,
"Chile","CHL",4,
"China","CHN",1,
"Colombia","COL",1,
"Comoros","COM",0,
"Congo","COG",73,
"Congo, Dem Rep","COD",30,
"Costa Rica","CRI",0,
"Croatia","HRV",64,
"Cuba","CUB",0,
"Cyprus","CYP",0,
"Czech Rep","CZE",0,
"Denmark","DNK",0,
"Djibouti","DJI",0,
"Dominica","DMA",0,
"Dominican Rep","DOM",0,
"Ecuador","ECU",0,
"Egypt","EGY",97,
"El Salvador","SLV",30,
"Equatorial Guinea","GNQ",0,
"Eritrea","ERI",56,
"Estonia","EST",1,
"Ethiopia","ETH",0,
"Fiji","FJI",0,
"Finland","FIN",3,
"France","FRA",12,
"French Guiana","GUF",0,
"French Polynesia","PYF",0,
"Gabon","GAB",0,
"Gambia","GMB",63,
"Gaza Strip","",18,
"Georgia","GEO",8,
"Germany","DEU",31,
"Ghana","GHA",43,
"Greece","GRC",22,
"Greenland","GRL",0,
"Grenada","GRD",0,
"Guatemala","GTM",2,
"Guinea","GIN",0,
"Guinea-Bissau","GNB",48,
"Guyana","GUY",0,
"Haiti","HTI",7,
"Honduras","HND",0,
"Hungary","HUN",94,
"Iceland","ISL",0,
"India","IND",34,
"Indonesia","IDN",0,
"Iran, Islamic Rep","IRN",7,
"Iraq","IRQ",53,
"Ireland","IRL",6,
"Israel","ISR",55,
"Italy","ITA",5,
"Jamaica","JAM",0,
"Japan","JPN",0,
"Jordan","JOR",23,
"Kazakhstan","KAZ",31,
"Kenya","KEN",33,
"Korea, Dem People's Rep","PRK",13,
"Korea, Rep","KOR",7,
"Kuwait","KWT",100,
"Kyrgyzstan","KGZ",0,
"Lao People's Dem Rep","LAO",43,
"Latvia","LVA",53,
"Lebanon","LBN",1,
"Lesotho","LSO",0,
"Liberia","LBR",14,
"Libyan Arab Jamahiriya","LBY",0,
"Lithuania","LTU",38,
"Luxembourg","LUX",68,
"Macedonia, FYR","MKD",16,
"Madagascar","MDG",0,
"Malawi","MWI",7,
"Malaysia","MYS",0,
"Maldives","MDV",0,
"Mali","MLI",40,
"Malta","MLT",0,
"Mauritania","MRT",97,
"Mauritius","MUS",0,
"Mexico","MEX",11,
"Moldova, Rep","MDA",91,
"Mongolia","MNG",0,
"Morocco","MAR",0,
"Mozambique","MOZ",54,
"Myanmar","MMR",16,
"Namibia","NAM",65,
"Nepal","NPL",6,
"Netherlands","NLD",88,
"New Zealand","NZL",0,
"Nicaragua","NIC",4,
"Niger","NER",90,
"Nigeria","NGA",23,
"Norway","NOR",0,
"Oman","OMN",0,
"Pakistan","PAK",77,
"Panama","PAN",0,
"Papua New Guinea","PNG",0,
"Paraguay","PRY",72,
"Peru","PER",16,
"Philippines","PHL",0,
"Poland","POL",13,
"Portugal","PRT",45,
"Puerto Rico","PRI",0,
"Qatar","QAT",4,
"Réunion","REU",0,
"Romania","ROU",80,
"Russian Federation","RUS",4,
"Rwanda","RWA",0,
"Saint Kitts and Nevis","KNA",0,
"Sao Tome & Principe","STP",0,
"Saudi Arabia","SAU",0,
"Senegal","SEN",33,
"Serbia and Montenegro","YUG",79,
"Seychelles","SYC",0,
"Sierra Leone","SLE",0,
"Singapore","SGP",0,
"Slovakia","SVK",75,
"Slovenia","SVN",41,
"Solomon Islands","SLB",0,
"Somalia","SOM",59,
"South Africa","ZAF",10,
"Spain","ESP",0,
"Sri Lanka","LKA",0,
"St. Lucia","LCA",0,
"St. Vincent & Grenadines","VCT",0,
"Sudan","SDN",77,
"Suriname","SUR",28,
"Swaziland","SWZ",42,
"Sweden","SWE",2,
"Switzerland","CHE",25,
"Syrian Arab Rep","SYR",80,
"Tajikistan","TJK",17,
"Tanzania","TZA",13,
"Thailand","THA",49,
"Togo","TGO",22,
"Trinidad and Tobago","TTO",0,
"Tunisia","TUN",9,
"Turkey","TUR",2,
"Turkmenistan","TKM",97,
"Uganda","UGA",41,
"Ukraine","UKR",62,
"United Arab Emirates","ARE",0,
"United Kingdom","GBR",1,
"United States","USA",3,
"Uruguay","URY",58,
"Uzbekistan","UZB",77,
"Venezuela","VEN",41,
"Viet Nam","VNM",59,
"Yemen","YEM",0,
"Zambia","ZMB",24,
"Zimbabwe","ZWE",30,

Footnotes
No footnotes

Source
"Food and Agriculture Organization of the United Nations (FAO) Land and Water Development Division. 2007. AQUASTAT Information System on Water and Agriculture: Online database. Rome: FAO. Available on-line at http://www.fao.org/nr/water/aquastat/data/query/index.html."


Technical Notes
"Definition:"
"Dependency Ratio is the percentage of total renewable water resources originating outside of the country. This indicator can be used to compare how different countries depend on external water resources."
""
"The dependency ratio may theoretically vary between 0 and 100 percent. A country with a dependency ratio equal to zero does not receive any water from neighboring countries. A country with a dependency ratio equal to 100 percent receives all its water from external sources without producing any. This ratio does not consider the possible allocation of water to downstream countries."
""
"Years Covered and Frequency of Update:"
"Water resources data are typically not available in a time series. Data were collected over a period of 15 to 25 years and have been compiled since 2003 by the AQUASTAT global information system of water and agriculture. The current AQUASTAT database provides data per 5-year period if available. Data are presented by WRI as a single value for 1960-2005 because, for this variable, AQUASTAT lists only one number for each country over the entire time period covered by the database."
""
"AQUASTAT updates their website as new data become available, or when FAO conducts special regional studies."
""
"Methodology:"
"The computation of the dependency ratio requires the assessment of the total volume of incoming water resources from neighboring countries (IWR) and the internal renewable water resources (IRWR). The ratio is calculated by dividing the incoming water resources by the sum of these incoming resources and the internal renewable water resources."
""
"IWR is calculated by adding the volume of surface water entering the country (including that which is secured by treaties), the accounted flow of border rivers, the accounted part of shared lakes, and the groundwater entering the country. This calculation does not consider the allocation of water to downstream countries."
""
"IRWR is computed by adding up average annual surface runoff and groundwater recharge occurring within a country's borders. Surface water resources are usually computed by measuring or assessing total river flow occurring in a country on a yearly basis. Groundwater resources are estimated by measuring rainfall in arid areas where rainfall is assumed to infiltrate into aquifers. In humid areas, groundwater is estimated by looking at the surface flow of rivers."
""
"Special care is taken to avoid double counting resources that are common to both surface and groundwater called overlap. Two types of exchanges create overlap: contribution of aquifers to surface flow and recharge of aquifers by surface runoff. Aquifers contribute to surface flows in humid temperate or tropical regions and in special cases in regions called karstic domains (containing a porous karst limestone rock matrix). Surface water flow recharges groundwater by infiltrating through the soil during floods in arid, semi-arid, and karstic areas. This recharge is either directly measured or inferred by characteristics of the aquifers and piezometric levels."
""
"AQUASTAT collects its information from a number of sources--national water resources and irrigation master plans; national yearbooks statistics and reports; reports from FAO; international surveys; and results from surveys made by national or international research centers. In most cases, a critical analysis of the information was necessary to ensure consistency between the different data collected for a given country."
""
"When possible, cross-checking of information between countries was used to improve assessment in countries where information was limited. When several sources give different or contradictory figures preference was always given to information collected at national or sub-national level. This preference is based on the assumption that no regional information can be more accurate than studies carried out at the country level. Unless proven to be wrong, official rather than unofficial sources were used. In the case of shared water resources, a comparison between countries was made to ensure consistency at river-basin level."
""
"For more information, please refer to the following publication: Food and Agriculture Organization of the United Nations (FAO), Water Resources, Development and Management Service. 2003. AQUASTAT Information System on Water and Agriculture: Review of World Water Resources by Country. Available on-line at  http://www.fao.org/waicent/faoinfo/agricult/agl/aglw/aquastat/water_res/index.htm. Rome: FAO."
""
"Data Reliability:"
"While AQUASTAT represents the most complete and careful compilation of water resources statistics to date, freshwater data are generally of poor quality. Information sources are various but rarely complete. Access to information on water resources is still sometimes restricted for reasons related to sensitivity at the regional level. The accuracy and reliability of the information vary greatly among regions, countries, and categories of information, as does the year in which the information was gathered. As a result, no consistency can be ensured at the regional level on the duration and dates of the period of reference."
""
"For more information, please refer to the original data source or to the 2003 print publication Review of World Water Resources by Country in FAO's AQUASTAT Programme."