|
| 2015 | 2021 | Ratio | ||
| ~Population | No of OT | ~Population | No of OT | OT per 10,000 (Oct 2021) | |
| Malaysia | 30.0 | 1500 | 33.0 | 1893 | 0.5 |
| Thailand | 68.0 | 114 | 70.0 | 1578 | 0.4 |
| Singapore | 5.5 | 905 | 5.9 | 1300 | 2.1 |
| Philippines | 102.0 | 519 | 111.0 | ~4000 | 0.4 |
| Indonesia | 258.0 | 1085 | 276.4 | ~1700 | 0.1 |
| Japan | 123.0 | 74,800 | 128 | ~100,000 | 7.8 |
| Australia | 23.7 | 18,000 | 25.8 | 25,632 | 9.9 |
| USA | 322.5 | 113,200 | 333.0 | 127,000 | 3.8 |
| Canada | 35.5 | 9827 | 38.0 | 19,717 | 5.1 |
| UK | 63.4 | 36,043 | 67.9 | ~55,000 | 8.1 |
| Sweden | 9.6 | 9000 | 10.1 | ~11,000 | 10.8 |