| Rank | Country | Value | Year |
|---|---|---|---|
| 1 | Bermuda | 32.33 | 2021 |
| 2 | Nauru | 26.9 | 2021 |
| 3 | Cayman Islands | 25.26 | 2021 |
| 4 | Zimbabwe | 24.62 | 2021 |
| 5 | Belize | 24.36 | 2021 |
| 6 | Trinidad and Tobago | 24.25 | 2021 |
| 7 | Turkiye | 22.91 | 2021 |
| 8 | Angola | 22.47 | 2021 |
| 9 | Uganda | 22.27 | 2021 |
| 10 | Norway | 21.99 | 2021 |
| 11 | Korea, Rep. | 20.58 | 2021 |
| 12 | Rwanda | 20.56 | 2021 |
| 13 | Switzerland | 19.9 | 2021 |
| 14 | Nepal | 19.37 | 2021 |
| 15 | Ethiopia | 19.35 | 2021 |
| 16 | Sierra Leone | 19.23 | 2021 |
| 17 | Liberia | 19.09 | 2021 |
| 18 | Barbados | 18.98 | 2021 |
| 19 | Fiji | 18.51 | 2021 |
| 20 | Tanzania | 18.16 | 2021 |
| 21 | Gambia, The | 18.08 | 2021 |
| 22 | Guinea | 18.06 | 2021 |
| 23 | Kenya | 17.47 | 2021 |
| 24 | Solomon Islands | 17.44 | 2021 |
| 25 | Guyana | 17.33 | 2021 |
| 26 | Vanuatu | 17.26 | 2021 |
| 27 | Cabo Verde | 17.18 | 2021 |
| 28 | India | 17.15 | 2021 |
| 29 | Papua New Guinea | 17.05 | 2021 |
| 30 | Palau | 16.86 | 2021 |
| 31 | St. Vincent and the Grenadines | 16.85 | 2021 |
| 32 | Guinea-Bissau | 16.74 | 2021 |
| 33 | Burundi | 16.41 | 2021 |
| 34 | Sri Lanka | 16.28 | 2021 |
| 35 | Antigua and Barbuda | 16.12 | 2021 |
| 36 | Jamaica | 16.05 | 2021 |
| 37 | Ghana | 15.94 | 2021 |
| 38 | Suriname | 15.82 | 2021 |
| 39 | Mauritania | 15.59 | 2021 |
| 40 | Cote d'Ivoire | 15.54 | 2021 |
| 41 | Senegal | 15.36 | 2021 |
| 42 | Nigeria | 15.34 | 2021 |
| 43 | Algeria | 14.95 | 2021 |
| 44 | Bangladesh | 14.63 | 2021 |
| 45 | Benin | 14.49 | 2021 |
| 46 | Togo | 13.87 | 2021 |
| 47 | Mali | 13.56 | 2021 |
| 48 | Zambia | 13.33 | 2021 |
| 49 | Thailand | 13.17 | 2021 |
| 50 | Madagascar | 12.49 | 2021 |
| 51 | Venezuela, RB | 11.82 | 2021 |
| 52 | Niger | 11.74 | 2021 |
| 53 | Cuba | 11.73 | 2021 |
| 54 | Malawi | 11.71 | 2021 |
| 55 | Burkina Faso | 11.54 | 2021 |
| 56 | Panama | 11.39 | 2021 |
| 57 | Azerbaijan | 11.05 | 2021 |
| 58 | Mozambique | 10.8 | 2021 |
| 59 | Iceland | 10.33 | 2021 |
| 60 | Comoros | 9.52 | 2021 |
| 61 | Uzbekistan | 9.39 | 2021 |
| 62 | Pakistan | 9.21 | 2021 |
| 63 | Maldives | 8.97 | 2021 |
| 64 | North Macedonia | 8.53 | 2021 |
| 65 | Brazil | 8.41 | 2021 |
| 66 | Cambodia | 8.13 | 2021 |
| 67 | Dominican Republic | 7.8 | 2021 |
| 68 | Bolivia | 7.77 | 2021 |
| 69 | Morocco | 7.75 | 2021 |
| 70 | Japan | 7.7 | 2021 |
| 71 | Tonga | 7.64 | 2021 |
| 72 | Argentina | 7.57 | 2021 |
| 73 | Uruguay | 6.86 | 2021 |
| 74 | Armenia | 6.6 | 2021 |
| 75 | China | 6.43 | 2021 |
| 76 | Ecuador | 6.36 | 2021 |
| 77 | Tajikistan | 6.35 | 2021 |
| 78 | Mongolia | 6.21 | 2021 |
| 79 | Paraguay | 6.21 | 2021 |
| 80 | Seychelles | 6.16 | 2021 |
| 81 | Aruba | 6.04 | 2021 |
| 82 | Belarus | 6.03 | 2021 |
| 83 | Israel | 5.99 | 2021 |
| 84 | Russian Federation | 5.99 | 2021 |
| 85 | Bhutan | 5.91 | 2021 |
| 86 | Indonesia | 5.82 | 2021 |
| 87 | Viet Nam | 5.81 | 2021 |
| 88 | Malaysia | 5.62 | 2021 |
| 89 | Botswana | 5.49 | 2021 |
| 90 | Honduras | 5.37 | 2021 |
| 91 | French Polynesia | 5 | 2021 |
| 92 | Philippines | 4.95 | 2021 |
| 93 | Eswatini | 4.93 | 2021 |
| 94 | South Africa | 4.89 | 2021 |
| 95 | Austria | 4.81 | 2021 |
| 96 | Belgium | 4.81 | 2021 |
| 97 | Bulgaria | 4.81 | 2021 |
| 98 | Croatia | 4.81 | 2021 |
| 99 | Cyprus | 4.81 | 2021 |
| 100 | Czechia | 4.81 | 2021 |
| 101 | Denmark | 4.81 | 2021 |
| 102 | El Salvador | 4.81 | 2021 |
| 103 | Estonia | 4.81 | 2021 |
| 104 | Finland | 4.81 | 2021 |
| 105 | France | 4.81 | 2021 |
| 106 | Germany | 4.81 | 2021 |
| 107 | Greece | 4.81 | 2021 |
| 108 | Hungary | 4.81 | 2021 |
| 109 | Ireland | 4.81 | 2021 |
| 110 | Italy | 4.81 | 2021 |
| 111 | Latvia | 4.81 | 2021 |
| 112 | Lithuania | 4.81 | 2021 |
| 113 | Luxembourg | 4.81 | 2021 |
| 114 | Malta | 4.81 | 2021 |
| 115 | Netherlands | 4.81 | 2021 |
| 116 | Poland | 4.81 | 2021 |
| 117 | Portugal | 4.81 | 2021 |
| 118 | Romania | 4.81 | 2021 |
| 119 | Slovak Republic | 4.81 | 2021 |
| 120 | Slovenia | 4.81 | 2021 |
| 121 | Spain | 4.81 | 2021 |
| 122 | Sweden | 4.81 | 2021 |
| 123 | United Arab Emirates | 4.72 | 2021 |
| 124 | Myanmar | 4.7 | 2021 |
| 125 | Namibia | 4.6 | 2021 |
| 126 | Kazakhstan | 4.53 | 2021 |
| 127 | Kyrgyz Republic | 4.48 | 2021 |
| 128 | Libya | 4.4 | 2021 |
| 129 | Costa Rica | 4.39 | 2021 |
| 130 | Nicaragua | 4.33 | 2021 |
| 131 | Lesotho | 4.19 | 2021 |
| 132 | Serbia | 4.14 | 2021 |
| 133 | Moldova | 4.08 | 2021 |
| 134 | Montenegro | 3.94 | 2021 |
| 135 | Canada | 3.88 | 2021 |
| 136 | Guatemala | 3.79 | 2021 |
| 137 | Oman | 3.75 | 2021 |
| 138 | Bosnia and Herzegovina | 3.53 | 2021 |
| 139 | Kuwait | 3.44 | 2021 |
| 140 | Colombia | 3.39 | 2021 |
| 141 | Albania | 3.3 | 2021 |
| 142 | Qatar | 3.24 | 2021 |
| 143 | Ukraine | 3.01 | 2021 |
| 144 | Bahrain | 2.92 | 2021 |
| 145 | Lao PDR | 2.6 | 2021 |
| 146 | United States | 2.56 | 2021 |
| 147 | Timor-Leste | 2.52 | 2021 |
| 148 | United Kingdom | 2.12 | 2021 |
| 149 | Mauritius | 1.34 | 2021 |
| 150 | Georgia | 1.32 | 2021 |
| 151 | New Zealand | 1.25 | 2021 |
| 152 | Australia | 1.21 | 2021 |
| 153 | Chile | 1.2 | 2021 |
| 154 | Singapore | 0.5 | 2021 |
| 155 | Peru | 0.37 | 2021 |
| 156 | Brunei Darussalam | 0.05 | 2021 |
| 157 | Hong Kong SAR, China | 0 | 2021 |
| 158 | Macao SAR, China | 0 | 2021 |
| 159 | Sudan | 0 | 2021 |