| Rank | Country | Value | Year |
|---|---|---|---|
| 1 | Korea, Rep. | 33.23 | 2021 |
| 2 | Norway | 31.9 | 2021 |
| 3 | Turkiye | 29.18 | 2021 |
| 4 | Bermuda | 28.32 | 2021 |
| 5 | Sudan | 27.5 | 2021 |
| 6 | Nauru | 26.39 | 2021 |
| 7 | Solomon Islands | 25.91 | 2021 |
| 8 | Switzerland | 25.46 | 2021 |
| 9 | Liechtenstein | 25.4 | 2021 |
| 10 | India | 24.74 | 2021 |
| 11 | Barbados | 21.69 | 2021 |
| 12 | Algeria | 20.74 | 2021 |
| 13 | Morocco | 20.21 | 2021 |
| 14 | Belize | 19.92 | 2021 |
| 15 | Zambia | 19.72 | 2021 |
| 16 | Uganda | 19.62 | 2021 |
| 17 | Fiji | 19.26 | 2021 |
| 18 | Iceland | 19.22 | 2021 |
| 19 | Cayman Islands | 19.17 | 2021 |
| 20 | Thailand | 19.05 | 2021 |
| 21 | Guyana | 18.96 | 2021 |
| 22 | Zimbabwe | 18.6 | 2021 |
| 23 | Angola | 18.59 | 2021 |
| 24 | Tanzania | 17.87 | 2021 |
| 25 | Trinidad and Tobago | 17.73 | 2021 |
| 26 | Ethiopia | 17.65 | 2021 |
| 27 | Rwanda | 16.87 | 2021 |
| 28 | Burundi | 16.76 | 2021 |
| 29 | Kenya | 16.71 | 2021 |
| 30 | Ecuador | 16.45 | 2021 |
| 31 | Jamaica | 16.21 | 2021 |
| 32 | Bangladesh | 15.89 | 2021 |
| 33 | Suriname | 15.49 | 2021 |
| 34 | Malawi | 14.88 | 2021 |
| 35 | St. Vincent and the Grenadines | 14.44 | 2021 |
| 36 | Nepal | 13.48 | 2021 |
| 37 | Benin | 13.26 | 2021 |
| 38 | Burkina Faso | 13.26 | 2021 |
| 39 | Gambia, The | 13.26 | 2021 |
| 40 | Ghana | 13.26 | 2021 |
| 41 | Guinea | 13.26 | 2021 |
| 42 | Guinea-Bissau | 13.26 | 2021 |
| 43 | Liberia | 13.26 | 2021 |
| 44 | Mali | 13.26 | 2021 |
| 45 | Niger | 13.26 | 2021 |
| 46 | Nigeria | 13.26 | 2021 |
| 47 | Senegal | 13.26 | 2021 |
| 48 | Sierra Leone | 13.26 | 2021 |
| 49 | Togo | 13.26 | 2021 |
| 50 | Cote d'Ivoire | 13.25 | 2021 |
| 51 | Madagascar | 13.23 | 2021 |
| 52 | Sri Lanka | 13.22 | 2021 |
| 53 | Antigua and Barbuda | 12.88 | 2021 |
| 54 | Vanuatu | 12.85 | 2021 |
| 55 | Mauritania | 12.78 | 2021 |
| 56 | Viet Nam | 12.65 | 2021 |
| 57 | Mozambique | 12.28 | 2021 |
| 58 | Bolivia | 11.93 | 2021 |
| 59 | Comoros | 11.83 | 2021 |
| 60 | Cambodia | 11.74 | 2021 |
| 61 | Bhutan | 11.06 | 2021 |
| 62 | Japan | 10.94 | 2021 |
| 63 | Cabo Verde | 10.85 | 2021 |
| 64 | Pakistan | 10.76 | 2021 |
| 65 | Dominican Republic | 10.58 | 2021 |
| 66 | Venezuela, RB | 10.46 | 2021 |
| 67 | Papua New Guinea | 10.41 | 2021 |
| 68 | Azerbaijan | 10.23 | 2021 |
| 69 | Austria | 10.21 | 2021 |
| 70 | Belgium | 10.21 | 2021 |
| 71 | Bulgaria | 10.21 | 2021 |
| 72 | Croatia | 10.21 | 2021 |
| 73 | Cyprus | 10.21 | 2021 |
| 74 | Czechia | 10.21 | 2021 |
| 75 | Denmark | 10.21 | 2021 |
| 76 | Estonia | 10.21 | 2021 |
| 77 | Finland | 10.21 | 2021 |
| 78 | France | 10.21 | 2021 |
| 79 | Germany | 10.21 | 2021 |
| 80 | Greece | 10.21 | 2021 |
| 81 | Hungary | 10.21 | 2021 |
| 82 | Ireland | 10.21 | 2021 |
| 83 | Italy | 10.21 | 2021 |
| 84 | Latvia | 10.21 | 2021 |
| 85 | Lithuania | 10.21 | 2021 |
| 86 | Luxembourg | 10.21 | 2021 |
| 87 | Malta | 10.21 | 2021 |
| 88 | Netherlands | 10.21 | 2021 |
| 89 | Poland | 10.21 | 2021 |
| 90 | Portugal | 10.21 | 2021 |
| 91 | Romania | 10.21 | 2021 |
| 92 | Slovak Republic | 10.21 | 2021 |
| 93 | Slovenia | 10.21 | 2021 |
| 94 | Spain | 10.21 | 2021 |
| 95 | Sweden | 10.21 | 2021 |
| 96 | Lao PDR | 10.18 | 2021 |
| 97 | Colombia | 10.17 | 2021 |
| 98 | Serbia | 9.96 | 2021 |
| 99 | Uzbekistan | 9.82 | 2021 |
| 100 | China | 9.26 | 2021 |
| 101 | Panama | 9.02 | 2021 |
| 102 | Oman | 8.87 | 2021 |
| 103 | Argentina | 8.86 | 2021 |
| 104 | Brazil | 8.86 | 2021 |
| 105 | United Kingdom | 8.85 | 2021 |
| 106 | El Salvador | 8.82 | 2021 |
| 107 | Paraguay | 8.7 | 2021 |
| 108 | Uruguay | 8.6 | 2021 |
| 109 | Tajikistan | 8.59 | 2021 |
| 110 | Costa Rica | 8.42 | 2021 |
| 111 | Tonga | 8.42 | 2021 |
| 112 | Maldives | 8.23 | 2021 |
| 113 | North Macedonia | 8.23 | 2021 |
| 114 | Honduras | 8.15 | 2021 |
| 115 | Nicaragua | 8.11 | 2021 |
| 116 | Moldova | 8.06 | 2021 |
| 117 | Myanmar | 8 | 2021 |
| 118 | Cuba | 7.99 | 2021 |
| 119 | Belarus | 7.97 | 2021 |
| 120 | Kyrgyz Republic | 7.97 | 2021 |
| 121 | Russian Federation | 7.97 | 2021 |
| 122 | Israel | 7.95 | 2021 |
| 123 | Armenia | 7.87 | 2021 |
| 124 | Philippines | 7.6 | 2021 |
| 125 | Guatemala | 7.51 | 2021 |
| 126 | French Polynesia | 7.19 | 2021 |
| 127 | Indonesia | 6.85 | 2021 |
| 128 | Seychelles | 6.77 | 2021 |
| 129 | Bosnia and Herzegovina | 6.63 | 2021 |
| 130 | Botswana | 6.55 | 2021 |
| 131 | Eswatini | 6.37 | 2021 |
| 132 | Lesotho | 6.37 | 2021 |
| 133 | Namibia | 6.37 | 2021 |
| 134 | South Africa | 6.37 | 2021 |
| 135 | Montenegro | 6.2 | 2021 |
| 136 | Qatar | 6.07 | 2021 |
| 137 | United Arab Emirates | 6.06 | 2021 |
| 138 | Aruba | 6.03 | 2021 |
| 139 | Bahrain | 6.01 | 2021 |
| 140 | Chile | 6 | 2021 |
| 141 | Kazakhstan | 5.94 | 2021 |
| 142 | Kuwait | 5.9 | 2021 |
| 143 | Ukraine | 5.82 | 2021 |
| 144 | Mongolia | 5.72 | 2021 |
| 145 | Palau | 5.64 | 2021 |
| 146 | Libya | 5.55 | 2021 |
| 147 | Canada | 5.17 | 2021 |
| 148 | Albania | 4.74 | 2021 |
| 149 | Malaysia | 4.33 | 2021 |
| 150 | Georgia | 3.95 | 2021 |
| 151 | United States | 3.09 | 2021 |
| 152 | Timor-Leste | 2.52 | 2021 |
| 153 | Peru | 1.51 | 2021 |
| 154 | New Zealand | 1.07 | 2021 |
| 155 | Australia | 0.98 | 2021 |
| 156 | Mauritius | 0.88 | 2021 |
| 157 | Singapore | 0.32 | 2021 |
| 158 | Brunei Darussalam | 0.12 | 2021 |
| 159 | Hong Kong SAR, China | 0 | 2021 |
| 160 | Macao SAR, China | 0 | 2021 |