| Rank | Country | Value | Year |
|---|---|---|---|
| 1 | Belize | 36.89 | 2021 |
| 2 | Bermuda | 30.58 | 2021 |
| 3 | Solomon Islands | 24.23 | 2021 |
| 4 | Rwanda | 23.54 | 2021 |
| 5 | Cayman Islands | 23.29 | 2021 |
| 6 | Tanzania | 20.71 | 2021 |
| 7 | Palau | 20.27 | 2021 |
| 8 | Angola | 20.25 | 2021 |
| 9 | Barbados | 20.18 | 2021 |
| 10 | Liberia | 17.79 | 2021 |
| 11 | Fiji | 17.59 | 2021 |
| 12 | Sierra Leone | 17.58 | 2021 |
| 13 | Gambia, The | 17.33 | 2021 |
| 14 | Burundi | 16.21 | 2021 |
| 15 | Nauru | 16 | 2021 |
| 16 | Trinidad and Tobago | 15.59 | 2021 |
| 17 | Guinea | 15.44 | 2021 |
| 18 | Vanuatu | 14.93 | 2021 |
| 19 | Cabo Verde | 14.79 | 2021 |
| 20 | Antigua and Barbuda | 13.9 | 2021 |
| 21 | Kenya | 13.82 | 2021 |
| 22 | Uganda | 13.33 | 2021 |
| 23 | Benin | 13.28 | 2021 |
| 24 | Guinea-Bissau | 13.26 | 2021 |
| 25 | Korea, Rep. | 12.67 | 2021 |
| 26 | Ghana | 12.51 | 2021 |
| 27 | Panama | 12.47 | 2021 |
| 28 | Norway | 12.19 | 2021 |
| 29 | Switzerland | 12.19 | 2021 |
| 30 | Ethiopia | 12.06 | 2021 |
| 31 | Togo | 11.62 | 2021 |
| 32 | Nigeria | 11.51 | 2021 |
| 33 | Nepal | 11.39 | 2021 |
| 34 | Sri Lanka | 11.03 | 2021 |
| 35 | Suriname | 11.03 | 2021 |
| 36 | Venezuela, RB | 10.66 | 2021 |
| 37 | Guyana | 10.42 | 2021 |
| 38 | Algeria | 9.89 | 2021 |
| 39 | Niger | 9.64 | 2021 |
| 40 | Mali | 9.48 | 2021 |
| 41 | Malawi | 9.04 | 2021 |
| 42 | Zimbabwe | 9 | 2021 |
| 43 | St. Vincent and the Grenadines | 8.71 | 2021 |
| 44 | Senegal | 7.98 | 2021 |
| 45 | Maldives | 7.89 | 2021 |
| 46 | Papua New Guinea | 7.73 | 2021 |
| 47 | Jamaica | 7.69 | 2021 |
| 48 | Aruba | 7.57 | 2021 |
| 49 | Morocco | 7.37 | 2021 |
| 50 | Mongolia | 7.35 | 2021 |
| 51 | Turkiye | 7.09 | 2021 |
| 52 | Montenegro | 6.91 | 2021 |
| 53 | Cuba | 6.41 | 2021 |
| 54 | Israel | 6.22 | 2021 |
| 55 | Madagascar | 6.18 | 2021 |
| 56 | Mauritania | 6.16 | 2021 |
| 57 | Thailand | 6.03 | 2021 |
| 58 | Cote d'Ivoire | 5.93 | 2021 |
| 59 | Iceland | 5.76 | 2021 |
| 60 | Bangladesh | 5.75 | 2021 |
| 61 | Pakistan | 5.55 | 2021 |
| 62 | Burkina Faso | 5.2 | 2021 |
| 63 | Canada | 5.15 | 2021 |
| 64 | United Arab Emirates | 5.13 | 2021 |
| 65 | Azerbaijan | 4.75 | 2021 |
| 66 | Philippines | 4.52 | 2021 |
| 67 | North Macedonia | 4.38 | 2021 |
| 68 | Bosnia and Herzegovina | 4.33 | 2021 |
| 69 | Seychelles | 4.29 | 2021 |
| 70 | Russian Federation | 4.23 | 2021 |
| 71 | Tonga | 4.03 | 2021 |
| 72 | Comoros | 3.92 | 2021 |
| 73 | Mozambique | 3.75 | 2021 |
| 74 | Bhutan | 3.73 | 2021 |
| 75 | Costa Rica | 3.71 | 2021 |
| 76 | Libya | 3.56 | 2021 |
| 77 | India | 3.52 | 2021 |
| 78 | French Polynesia | 3.41 | 2021 |
| 79 | Honduras | 3.36 | 2021 |
| 80 | Malaysia | 3.15 | 2021 |
| 81 | Japan | 3.04 | 2021 |
| 82 | Armenia | 2.97 | 2021 |
| 83 | Bolivia | 2.95 | 2021 |
| 84 | Qatar | 2.91 | 2021 |
| 85 | South Africa | 2.79 | 2021 |
| 86 | Timor-Leste | 2.55 | 2021 |
| 87 | Viet Nam | 2.52 | 2021 |
| 88 | Dominican Republic | 2.51 | 2021 |
| 89 | Cambodia | 2.43 | 2021 |
| 90 | Paraguay | 2.39 | 2021 |
| 91 | Belarus | 2.38 | 2021 |
| 92 | Botswana | 2.35 | 2021 |
| 93 | Brazil | 2.31 | 2021 |
| 94 | Indonesia | 2.3 | 2021 |
| 95 | Colombia | 2.29 | 2021 |
| 96 | Albania | 2.28 | 2021 |
| 97 | Zambia | 2.27 | 2021 |
| 98 | Mauritius | 2.1 | 2021 |
| 99 | Oman | 2.07 | 2021 |
| 100 | China | 2.04 | 2021 |
| 101 | Kuwait | 1.92 | 2021 |
| 102 | Uruguay | 1.91 | 2021 |
| 103 | Serbia | 1.72 | 2021 |
| 104 | Moldova | 1.6 | 2021 |
| 105 | Guatemala | 1.55 | 2021 |
| 106 | Nicaragua | 1.55 | 2021 |
| 107 | Kazakhstan | 1.53 | 2021 |
| 108 | Bahrain | 1.47 | 2021 |
| 109 | Kyrgyz Republic | 1.39 | 2021 |
| 110 | El Salvador | 1.37 | 2021 |
| 111 | Austria | 1.34 | 2021 |
| 112 | Belgium | 1.34 | 2021 |
| 113 | Bulgaria | 1.34 | 2021 |
| 114 | Croatia | 1.34 | 2021 |
| 115 | Cyprus | 1.34 | 2021 |
| 116 | Czechia | 1.34 | 2021 |
| 117 | Denmark | 1.34 | 2021 |
| 118 | Estonia | 1.34 | 2021 |
| 119 | Finland | 1.34 | 2021 |
| 120 | France | 1.34 | 2021 |
| 121 | Germany | 1.34 | 2021 |
| 122 | Greece | 1.34 | 2021 |
| 123 | Hungary | 1.34 | 2021 |
| 124 | Ireland | 1.34 | 2021 |
| 125 | Italy | 1.34 | 2021 |
| 126 | Latvia | 1.34 | 2021 |
| 127 | Lithuania | 1.34 | 2021 |
| 128 | Luxembourg | 1.34 | 2021 |
| 129 | Malta | 1.34 | 2021 |
| 130 | Netherlands | 1.34 | 2021 |
| 131 | Poland | 1.34 | 2021 |
| 132 | Portugal | 1.34 | 2021 |
| 133 | Romania | 1.34 | 2021 |
| 134 | Slovak Republic | 1.34 | 2021 |
| 135 | Slovenia | 1.34 | 2021 |
| 136 | Spain | 1.34 | 2021 |
| 137 | Sweden | 1.34 | 2021 |
| 138 | Uzbekistan | 1.31 | 2021 |
| 139 | Argentina | 1.3 | 2021 |
| 140 | Myanmar | 1.27 | 2021 |
| 141 | Ecuador | 1.26 | 2021 |
| 142 | Lesotho | 1.18 | 2021 |
| 143 | Ukraine | 1.18 | 2021 |
| 144 | United States | 1.03 | 2021 |
| 145 | United Kingdom | 1.02 | 2021 |
| 146 | Namibia | 0.91 | 2021 |
| 147 | Lao PDR | 0.82 | 2021 |
| 148 | Tajikistan | 0.78 | 2021 |
| 149 | Australia | 0.72 | 2021 |
| 150 | New Zealand | 0.63 | 2021 |
| 151 | Eswatini | 0.57 | 2021 |
| 152 | Georgia | 0.54 | 2021 |
| 153 | Chile | 0.34 | 2021 |
| 154 | Peru | 0.08 | 2021 |
| 155 | Brunei Darussalam | 0 | 2021 |
| 156 | Hong Kong SAR, China | 0 | 2021 |
| 157 | Macao SAR, China | 0 | 2021 |
| 158 | Singapore | 0 | 2021 |
| 159 | Sudan | 0 | 2021 |