|
| 年 | 冬季 | 春季 | 夏季 | 秋季 |
| 1961~1970 | −0.7 | −1.6 | −0.2 | 0.5 | −0.6 |
| 1971~1980 | −0.7 | −1.3 | −0.4 | 0.3 | 0.0 |
| 1981~1990 | −0.3 | −0.3 | −0.5 | −0.3 | 0.0 |
| 1991~2000 | 0.1 | 0.2 | 0.3 | 0.0 | −0.2 |
| 2001~2010 | 0.1 | 0.0 | 0.1 | 0.2 | 0.2 |
| 2011~2017 | 0.2 | 0.2 | 1.1 | 0.4 | −0.1 |