| 年代际 | 久治 | 班玛 | 达日 | 甘德 | 玛多 | 玛沁 | 果洛 |
| 1976~1979 | 10.0 | 6.3 | 3.8 | 4.5 | 3.8 | 4.8 | 6.1 |
| 1980~1989 | 5.5 | 5.8 | 3.3 | 5.5 | 3.8 | 5.6 | 5.0 |
| 1990~1999 | 4.1 | 4.4 | 2.8 | 4.4 | 3.5 | 4.7 | 3.9 |
| 2000~2009 | 5.1 | 4.6 | 3.9 | 4.8 | 5.1 | 4.6 | 4.6 |
| 2010~2018 | 5.3 | 5.7 | 3.1 | 5.4 | 5.0 | 5.0 | 4.9 |
| 1998~2018 | 5.2 | 5.2 | 3.3 | 5.0 | 4.8 | 4.7 | 4.7 |
| 2009~2018 | 5.2 | 5.4 | 3.1 | 5.2 | 5.6 | 5.0 | 4.7 |
| 2014~2018 | 5.6 | 5.6 | 3.2 | 5.4 | 5.0 | 4.8 | 5.0 |
| 1976~2018 | 5.5 | 5.2 | 3.3 | 5.0 | 4.3 | 4.9 | 4.7 |