International zones
| Australia | 2 |
| Austria | 3 |
| Bahrain | 3 |
| Bangladesh | 2 |
| Belarus | 4 |
| Belgium | 3 |
| Bhutan | 4 |
| Brazil | 3 |
| Brunei | 1 |
| Bulgaria | 4 |
| Cambodia | 3 |
| Canada | 3 |
| China | 2 |
| Cyprus | 3 |
| Denmark | 3 |
| Egypt | 4 |
| Fiji | 3 |
| Finland | 3 |
| France | 3 |
| Germany | 3 |
| Great Britain | 2 |
| Greece | 3 |
| Hongkong | 1 |
| Hungary | 3 |
| Iceland | 4 |
| India | 2 |
| Indonesia | 1 |
| Iran | 4 |
| Ireland | 2 |
| Israel | 4 |
| Italy | 3 |
| Japan | 2 |
| Jordan | 4 |
| Korea, South | 2 |
| Kuwait | 4 |
| Laos | 3 |
| Luxembourg | 3 |
| Macau | 2 |
| Malaysia | 1 |
| Maldives | 2 |
| Mongolia | 4 |
| Myanmar | 2 |
| Nepal | 4 |
| Netherlands | 3 |
| New Zealand | 2 |
| Norway | 3 |
| Oman | 4 |
| Pakistan | 2 |
| Papua New Guinea | 3 |
| Poland | 4 |
| Portugal | 4 |
| Qatar | 4 |
| Romania | 4 |
| Russian Fed | 4 |
| Saudi Arabia | 3 |
| Singapore | 1 |
| Slovenia | 4 |
| Solomon Islands | 4 |
| South Africa | 4 |
| Spain | 2 |
| Sri Lanka | 2 |
| Sweden | 3 |
| Switzerland | 3 |
| Taiwan | 1 |
| Thailand | 1 |
| Turkey | 4 |
| UAE | 3 |
| Ukraine | 4 |
| USA | 3 |
| Vietnam | 2 |
| Yemen | 4 |
| Rest of World | 4 |