| 2000 | 2012 | |
|---|---|---|
| Brunei Darussalam | 20.0 | 15.0 |
| Myanmar | 13.0 | 15.0 |
| Viet Nam | 17.0 | 15.0 |
| Lao People's Democratic Republic | 11.0 | 11.0 |
| China | 17.0 | 13.0 |
| Thailand | 15.0 | 16.0 |
| Cambodia | 12.0 | 15.0 |
| Singapore | 10.0 | 8.0 |
| Philippines | 13.0 | 11.0 |
| Republic of Korea | 19.0 | 20.0 |
| Malaysia | 17.0 | 16.0 |
| Japan | 13.0 | 13.0 |
| Indonesia | 10.0 | 10.0 |