| Rank | Country | Value | Year |
|---|---|---|---|
| 1 | Austria | 4.3 | 2022 |
| 2 | Finland | 4.3 | 2022 |
| 3 | Singapore | 4.3 | 2022 |
| 4 | Belgium | 4.2 | 2022 |
| 5 | Spain | 4.2 | 2022 |
| 6 | Sweden | 4.2 | 2022 |
| 7 | Switzerland | 4.2 | 2022 |
| 8 | United Arab Emirates | 4.2 | 2022 |
| 9 | Bahrain | 4.1 | 2022 |
| 10 | Canada | 4.1 | 2022 |
| 11 | Denmark | 4.1 | 2022 |
| 12 | Estonia | 4.1 | 2022 |
| 13 | France | 4.1 | 2022 |
| 14 | Germany | 4.1 | 2022 |
| 15 | Hong Kong SAR, China | 4.1 | 2022 |
| 16 | Japan | 4 | 2022 |
| 17 | Latvia | 4 | 2022 |
| 18 | Netherlands | 4 | 2022 |
| 19 | Norway | 4 | 2022 |
| 20 | Greece | 3.9 | 2022 |
| 21 | Italy | 3.9 | 2022 |
| 22 | Philippines | 3.9 | 2022 |
| 23 | Poland | 3.9 | 2022 |
| 24 | Israel | 3.8 | 2022 |
| 25 | Korea, Rep. | 3.8 | 2022 |
| 26 | New Zealand | 3.8 | 2022 |
| 27 | South Africa | 3.8 | 2022 |
| 28 | United States | 3.8 | 2022 |
| 29 | China | 3.7 | 2022 |
| 30 | Czechia | 3.7 | 2022 |
| 31 | Ireland | 3.7 | 2022 |
| 32 | Malaysia | 3.7 | 2022 |
| 33 | United Kingdom | 3.7 | 2022 |
| 34 | Australia | 3.6 | 2022 |
| 35 | Djibouti | 3.6 | 2022 |
| 36 | Egypt, Arab Rep. | 3.6 | 2022 |
| 37 | Hungary | 3.6 | 2022 |
| 38 | Iceland | 3.6 | 2022 |
| 39 | India | 3.6 | 2022 |
| 40 | Lithuania | 3.6 | 2022 |
| 41 | Portugal | 3.6 | 2022 |
| 42 | Romania | 3.6 | 2022 |
| 43 | Saudi Arabia | 3.6 | 2022 |
| 44 | Turkiye | 3.6 | 2022 |
| 45 | Brazil | 3.5 | 2022 |
| 46 | Bulgaria | 3.5 | 2022 |
| 47 | Cyprus | 3.5 | 2022 |
| 48 | Luxembourg | 3.5 | 2022 |
| 49 | Mexico | 3.5 | 2022 |
| 50 | North Macedonia | 3.5 | 2022 |
| 51 | Qatar | 3.5 | 2022 |
| 52 | Slovak Republic | 3.5 | 2022 |
| 53 | Thailand | 3.5 | 2022 |
| 54 | Antigua and Barbuda | 3.4 | 2022 |
| 55 | Panama | 3.4 | 2022 |
| 56 | Peru | 3.4 | 2022 |
| 57 | Serbia | 3.4 | 2022 |
| 58 | Botswana | 3.3 | 2022 |
| 59 | Indonesia | 3.3 | 2022 |
| 60 | Papua New Guinea | 3.3 | 2022 |
| 61 | Slovenia | 3.3 | 2022 |
| 62 | Sri Lanka | 3.3 | 2022 |
| 63 | Viet Nam | 3.3 | 2022 |
| 64 | Bosnia and Herzegovina | 3.2 | 2022 |
| 65 | Chile | 3.2 | 2022 |
| 66 | Colombia | 3.2 | 2022 |
| 67 | Costa Rica | 3.2 | 2022 |
| 68 | Croatia | 3.2 | 2022 |
| 69 | El Salvador | 3.2 | 2022 |
| 70 | Honduras | 3.2 | 2022 |
| 71 | Malta | 3.2 | 2022 |
| 72 | Montenegro | 3.2 | 2022 |
| 73 | Solomon Islands | 3.2 | 2022 |
| 74 | Uruguay | 3.2 | 2022 |
| 75 | Argentina | 3.1 | 2022 |
| 76 | Belarus | 3.1 | 2022 |
| 77 | Dominican Republic | 3.1 | 2022 |
| 78 | Georgia | 3.1 | 2022 |
| 79 | Grenada | 3.1 | 2022 |
| 80 | Mali | 3.1 | 2022 |
| 81 | Mauritius | 3.1 | 2022 |
| 82 | Nigeria | 3.1 | 2022 |
| 83 | Oman | 3.1 | 2022 |
| 84 | Rwanda | 3.1 | 2022 |
| 85 | Ukraine | 3.1 | 2022 |
| 86 | Bahamas, The | 3 | 2022 |
| 87 | Bangladesh | 3 | 2022 |
| 88 | Gabon | 3 | 2022 |
| 89 | Iraq | 3 | 2022 |
| 90 | Moldova | 3 | 2022 |
| 91 | Paraguay | 3 | 2022 |
| 92 | Congo, Rep. | 2.9 | 2022 |
| 93 | Jamaica | 2.9 | 2022 |
| 94 | Kazakhstan | 2.9 | 2022 |
| 95 | Namibia | 2.9 | 2022 |
| 96 | Nicaragua | 2.9 | 2022 |
| 97 | Russian Federation | 2.9 | 2022 |
| 98 | Tajikistan | 2.9 | 2022 |
| 99 | Trinidad and Tobago | 2.9 | 2022 |
| 100 | Congo, Dem. Rep. | 2.8 | 2022 |
| 101 | Kuwait | 2.8 | 2022 |
| 102 | Lao PDR | 2.8 | 2022 |
| 103 | Mauritania | 2.8 | 2022 |
| 104 | Togo | 2.8 | 2022 |
| 105 | Uzbekistan | 2.8 | 2022 |
| 106 | Yemen, Rep. | 2.8 | 2022 |
| 107 | Zimbabwe | 2.8 | 2022 |
| 108 | Armenia | 2.7 | 2022 |
| 109 | Benin | 2.7 | 2022 |
| 110 | Cambodia | 2.7 | 2022 |
| 111 | Ghana | 2.7 | 2022 |
| 112 | Iran, Islamic Rep. | 2.7 | 2022 |
| 113 | Mongolia | 2.7 | 2022 |
| 114 | Sudan | 2.7 | 2022 |
| 115 | Algeria | 2.6 | 2022 |
| 116 | Bhutan | 2.6 | 2022 |
| 117 | Central African Republic | 2.6 | 2022 |
| 118 | Cuba | 2.6 | 2022 |
| 119 | Gambia, The | 2.6 | 2022 |
| 120 | Guatemala | 2.6 | 2022 |
| 121 | Guyana | 2.6 | 2022 |
| 122 | Madagascar | 2.6 | 2022 |
| 123 | Albania | 2.5 | 2022 |
| 124 | Guinea | 2.5 | 2022 |
| 125 | Haiti | 2.5 | 2022 |
| 126 | Syrian Arab Republic | 2.5 | 2022 |
| 127 | Venezuela, RB | 2.5 | 2022 |
| 128 | Bolivia | 2.4 | 2022 |
| 129 | Burkina Faso | 2.4 | 2022 |
| 130 | Guinea-Bissau | 2.4 | 2022 |
| 131 | Kyrgyz Republic | 2.4 | 2022 |
| 132 | Afghanistan | 2.3 | 2022 |
| 133 | Fiji | 2.3 | 2022 |
| 134 | Liberia | 2.3 | 2022 |
| 135 | Somalia | 2.3 | 2022 |
| 136 | Libya | 2.2 | 2022 |
| 137 | Angola | 2.1 | 2022 |
| 138 | Cameroon | 2.1 | 2022 |