| 2000 | 2005 | 2010 | 2011 | 2012 | |
|---|---|---|---|---|---|
| Ulsan | 15.2 | 9.6 | 10.2 | 10.3 | 10.7 |
| Gyeonggi-do | 15.5 | 10.3 | 10.5 | 10.4 | 10.5 |
| Jeju-do | 15.8 | 10.2 | 10.0 | 9.9 | 10.4 |
| Chungcheongnam-do | 12.7 | 8.9 | 9.9 | 9.8 | 10.2 |
| Gyeongsangnam-do | 13.4 | 9.0 | 9.9 | 9.9 | 10.1 |
| Daejeon | 14.1 | 9.6 | 9.6 | 9.9 | 10.1 |
| Incheon | 13.5 | 8.8 | 9.5 | 9.5 | 9.9 |
| Gwangju | 15.4 | 9.4 | 9.7 | 9.6 | 9.9 |
| Chungcheongbuk-do | 13.0 | 8.8 | 9.6 | 9.6 | 9.8 |
| Seoul | 12.8 | 8.8 | 9.2 | 9.0 | 9.3 |
| Gyeongsangbuk-do | 12.4 | 8.2 | 8.9 | 9.1 | 9.2 |
| Jeollanam-do | 12.0 | 8.0 | 8.7 | 8.7 | 9.0 |
| Jeollabuk-do | 12.4 | 8.2 | 8.7 | 8.7 | 8.7 |
| Daegu | 12.8 | 8.2 | 8.3 | 8.3 | 8.6 |
| Busan | 10.7 | 7.0 | 7.8 | 7.9 | 8.2 |
| Gangwon-do | 12.4 | 8.3 | 8.2 | 8.2 | 8.2 |