| Country Name | 1990 | 2000 | 2014 |
| Lesotho | 306 | 992 | 852 |
| South Africa | 313 | 585 | 834 |
| Swaziland | 279 | 832 | 733 |
| Djibouti | 626 | 619 | 619 |
| Namibia | 194 | 1060 | 561 |
| Mozambique | 403 | 513 | 551 |
| Timor-Leste | .. | .. | 498 |
| Kiribati | 116 | 372 | 497 |
| Gabon | 230 | 515 | 444 |
| Korea, Dem. People’s Rep. | 384 | 383 | 442 |
| Papua New Guinea | 371 | 418 | 417 |
| Zambia | 765 | 759 | 406 |
| Indonesia | 453 | 449 | 399 |
| Cambodia | 584 | 575 | 390 |
| Botswana | 545 | 914 | 385 |
| Congo, Rep. | 177 | 356 | 381 |
| Central African Republic | 864 | 1073 | 375 |
| Angola | 253 | 297 | 370 |
| Guinea-Bissau | 255 | 305 | 369 |
| Myanmar | 395 | 411 | 369 |
| Marshall Islands | 67 | 81 | 335 |
| Tanzania | 413 | 503 | 327 |
| Congo, Dem. Rep. | 328 | 327 | 325 |
| Nigeria | 262 | 325 | 322 |
| Sierra Leone | 252 | 305 | 310 |
| Liberia | 199 | 240 | 308 |
| Philippines | 441 | 368 | 288 |
| Zimbabwe | 289 | 605 | 278 |
| Somalia | 286 | 285 | 274 |
| Pakistan | 277 | 275 | 270 |
| Kenya | 140 | 286 | 246 |
| Madagascar | 393 | 293 | 235 |
| Bangladesh | 226 | 225 | 227 |
| Malawi | 322 | 392 | 227 |
| Cameroon | 110 | 309 | 220 |
| Ethiopia | 369 | 421 | 207 |
| Haiti | 250 | 270 | 200 |
| Greenland | 192 | 193 | 197 |
| Micronesia, Fed. Sts. | 379 | 279 | 195 |
| Tuvalu | 536 | 357 | 190 |
| Afghanistan | 189 | 190 | 189 |
| Lao PDR | 492 | 330 | 189 |
| Guinea | 249 | 228 | 177 |
| Gambia, The | 128 | 185 | 174 |
| Thailand | 197 | 241 | 171 |
| Mongolia | 403 | 253 | 170 |
| India | 217 | 216 | 167 |
| Cote d’Ivoire | 246 | 367 | 165 |
| Ghana | 209 | 216 | 165 |
| Bhutan | 777 | 402 | 164 |
| Equatorial Guinea | 84 | 96 | 162 |
| Uganda | 625 | 427 | 161 |
| Chad | 96 | 151 | 159 |
| Nepal | 164 | 163 | 158 |
| Moldova | 56 | 148 | 153 |
| South Sudan | .. | .. | 146 |
| Kyrgyz Republic | 95 | 244 | 142 |
| Vietnam | 251 | 197 | 140 |
| Cabo Verde | 175 | 160 | 138 |
| Senegal | 137 | 155 | 138 |
| Burundi | 164 | 290 | 126 |
| Bolivia | 251 | 184 | 120 |
| Peru | 242 | 185 | 120 |
| Mauritania | 434 | 250 | 111 |
| Georgia | 278 | 254 | 106 |
| Morocco | 147 | 118 | 106 |
| Guyana | 90 | 103 | 103 |
| Malaysia | 77 | 78 | 103 |
| Kazakhstan | 71 | 177 | 99 |
| Niger | 363 | 191 | 98 |
| Sao Tome and Principe | 135 | 114 | 97 |
| Sudan | 153 | 128 | 94 |
| Ukraine | 48 | 114 | 94 |
| Tajikistan | 72 | 219 | 91 |
| Korea, Rep. | 168 | 80 | 86 |
| Solomon Islands | 312 | 185 | 86 |
| Russian Federation | 50 | 128 | 84 |
| Macao SAR, China | 87 | 125 | 82 |
| Uzbekistan | 65 | 99 | 82 |
| Romania | 148 | 181 | 81 |
| Algeria | 64 | 83 | 78 |
| Eritrea | 203 | 177 | 78 |
| Azerbaijan | 319 | 681 | 77 |
| Hong Kong SAR, China | 127 | 110 | 74 |
| Nauru | 88 | 46 | 73 |
| China | 152 | 109 | 68 |
| Fiji | 84 | 53 | 67 |
| Sri Lanka | 66 | 66 | 65 |
| Turkmenistan | 94 | 208 | 64 |
| Rwanda | 83 | 98 | 63 |
| Vanuatu | 127 | 110 | 63 |
| Brunei Darussalam | 66 | 80 | 62 |
| Lithuania | 47 | 102 | 62 |
| Benin | 127 | 86 | 61 |
| Northern Mariana Islands | 91 | 118 | 61 |
| Dominican Republic | 147 | 100 | 60 |
| Belarus | 35 | 83 | 58 |
| Mali | 76 | 77 | 58 |
| Nicaragua | 80 | 56 | 58 |
| Togo | 54 | 52 | 58 |
| Guatemala | 75 | 68 | 57 |
| Burkina Faso | 87 | 70 | 54 |
| Ecuador | 132 | 99 | 54 |
| Latvia | 59 | 122 | 49 |
| Singapore | 62 | 52 | 49 |
| Yemen, Rep. | 136 | 116 | 48 |
| Panama | 39 | 62 | 46 |
| Armenia | 18 | 61 | 45 |
| Brazil | 84 | 61 | 44 |
| Honduras | 114 | 114 | 43 |
| Iraq | 54 | 50 | 43 |
| Paraguay | 66 | 49 | 43 |
| Bosnia and Herzegovina | 89 | 96 | 42 |
| Palau | 66 | 135 | 42 |
| El Salvador | 54 | 28 | 41 |
| Maldives | 146 | 64 | 41 |
| Guam | 49 | 42 | 40 |
| Libya | 40 | 40 | 40 |
| Suriname | 64 | 86 | 38 |
| Belize | 41 | 60 | 37 |
| Comoros | 54 | 39 | 35 |
| Colombia | 54 | 43 | 33 |
| Tunisia | 29 | 25 | 33 |
| Uruguay | 30 | 22 | 30 |
| Qatar | 43 | 52 | 29 |
| Bulgaria | 35 | 58 | 27 |
| Seychelles | 45 | 27 | 26 |
| Portugal | 71 | 51 | 25 |
| Argentina | 43 | 37 | 24 |
| Serbia | .. | .. | 24 |
| St. Vincent and the Grenadines | 27 | 26 | 24 |
| Venezuela, RB | 30 | 30 | 24 |
| French Polynesia | 32 | 38 | 22 |
| Iran, Islamic Rep. | 32 | 26 | 22 |
| Mauritius | 28 | 24 | 22 |
| Trinidad and Tobago | 10 | 17 | 22 |
| Kuwait | 12 | 33 | 21 |
| Mexico | 62 | 29 | 21 |
| Montenegro | .. | .. | 21 |
| Poland | 50 | 34 | 21 |
| Estonia | 24 | 61 | 20 |
| Albania | 24 | 23 | 19 |
| Samoa | 36 | 23 | 19 |
| Japan | 48 | 35 | 18 |
| Turkey | 53 | 37 | 18 |
| Syrian Arab Republic | 61 | 35 | 17 |
| Chile | 52 | 24 | 16 |
| Lebanon | 35 | 17 | 16 |
| Egypt, Arab Rep. | 35 | 26 | 15 |
| Macedonia, FYR | 49 | 36 | 15 |
| New Caledonia | 99 | 41 | 15 |
| Bahrain | 34 | 26 | 14 |
| Tonga | 36 | 31 | 14 |
| Bahamas, The | 21 | 26 | 12 |
| Croatia | 57 | 44 | 12 |
| Hungary | 39 | 38 | 12 |
| Malta | 7.2 | 4.7 | 12 |
| Saudi Arabia | 15 | 18 | 12 |
| Spain | 25 | 23 | 12 |
| United Kingdom | 12 | 12 | 12 |
| Aruba | 12 | 12 | 11 |
| Costa Rica | 29 | 20 | 11 |
| Turks and Caicos Islands | 0 | 61 | 10 |
| Oman | 29 | 14 | 9.6 |
| Cuba | 25 | 13 | 9.4 |
| Andorra | 49 | 18 | 9.2 |
| St. Lucia | 16 | 12 | 9.1 |
| Belgium | 18 | 14 | 9 |
| France | 20 | 13 | 8.7 |
| Norway | 8.2 | 6.2 | 8.1 |
| Austria | 21 | 16 | 7.8 |
| Slovenia | 39 | 22 | 7.7 |
| Virgin Islands (U.S.) | 4.7 | 7.7 | 7.7 |
| Antigua and Barbuda | 3.1 | 4.4 | 7.6 |
| Sweden | 7.8 | 5.4 | 7.5 |
| Ireland | 21 | 12 | 7.4 |
| New Zealand | 11 | 11 | 7.4 |
| St. Kitts and Nevis | 1.1 | 8.3 | 7.2 |
| Denmark | 6.7 | 11 | 7.1 |
| American Samoa | 26 | 6.9 | 7 |
| Cayman Islands | 12 | 4.5 | 7 |
| Slovak Republic | 35 | 23 | 6.7 |
| Luxembourg | 13 | 10 | 6.6 |
| Australia | 6.6 | 6.1 | 6.4 |
| Switzerland | 21 | 10 | 6.3 |
| Germany | 21 | 12 | 6.2 |
| Italy | 8.2 | 8.8 | 6 |
| Israel | 8.2 | 9.9 | 5.8 |
| Netherlands | 11 | 10 | 5.8 |
| West Bank and Gaza | 8.2 | 9.9 | 5.8 |
| Finland | 17 | 12 | 5.6 |
| Jordan | 14 | 8.1 | 5.5 |
| Cyprus | 5.2 | 4.3 | 5.3 |
| Canada | 8.5 | 6.6 | 5.2 |
| Greece | 9.3 | 8 | 4.8 |
| Jamaica | 7.1 | 6.5 | 4.7 |
| Czech Republic | 22 | 17 | 4.6 |
| Curacao | .. | .. | 3.7 |
| Iceland | 7.6 | 4.5 | 3.3 |
| United States | 12 | 6.8 | 3.1 |
| Monaco | 2.8 | 1.6 | 2.2 |
| British Virgin Islands | 17 | 9.2 | 1.7 |
| San Marino | 7.7 | 1.5 | 1.6 |
| United Arab Emirates | 12 | 12 | 1.6 |
| Puerto Rico | 6.5 | 5.2 | 1.4 |
| Grenada | 0.88 | 2.3 | 1.3 |
| Barbados | 2.7 | 2.4 | 0.91 |
| Dominica | 17 | 5.2 | 0.71 |
| Bermuda | 4.6 | 1.4 | 0 |
| Sint Maarten (Dutch part) | .. | .. | 0 |
| Channel Islands | .. | .. | .. |
| Faroe Islands | .. | .. | .. |
| Gibraltar | .. | .. | .. |
| Isle of Man | .. | .. | .. |
| Kosovo | .. | .. | .. |
| Liechtenstein | .. | .. | .. |
| St. Martin (French part) | .. | .. | .. |
Source: World Databank—World Development Indicators. World Bank. Available at http://databank.worldbank.org/data/reports.aspx?source=2&series=SH.TBS.INCD&country=#. Accessed on July 21, 2016.