| 序号 | 时间 (年) |
数据 (‰) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | |
| 7 | 2018 | 27.14 |
| 8 | 2017 | 23.70 |
| 9 | 2016 | 17.84 |
| 10 | 2015 | 15.79 |
| 11 | 2014 | 18.34 |
| 12 | 2013 | 20.19 |
| 13 | 2012 | 24.38 |
| 14 | 2011 | 18.63 |
| 15 | 2010 | 20.42 |
| 16 | 2009 | 19.45 |
| 17 | 2008 | 23.14 |
| 18 | 2007 | 23.65 |
| 19 | 2006 | 28.35 |
| 20 | 2005 | 22.62 |
| 21 | 2004 | 30.68 |
| 22 | 2003 | 24.53 |
| 23 | 2002 | 24.21 |
| 24 | 2001 | 26.85 |
| 25 | 2000 | 29.53 |
| 26 | 1999 | 27.31 |
| 27 | 1998 | 30.02 |
| 28 | 1997 | 33.05 |
| 29 | 1996 | 29.57 |
| 30 | 1995 | 29.35 |
| 31 | 1994 | 38.68 |
| 32 | 1993 | 43.88 |
| 33 | 1992 | 38.13 |
| 34 | 1991 | 28.74 |
| 35 | 1990 | 27.94 |
| 36 | 1989 | 28.30 |
| 37 | 1988 | 28.45 |
| 38 | 1987 | 28.71 |
| 39 | 1986 | 27.45 |
| 40 | 1985 | 32.94 |
| 41 | 1984 | 31.72 |
| 42 | 1983 | 23.02 |
| 43 | 1982 | 25.45 |
| 44 | 1980 | 33.47 |
| 45 | 1978 | 31.33 |
| 46 | 1975 | 26.93 |
| 47 | 1970 | 30.30 |
| 48 | 1965 | 31.27 |
| 49 | 1962 | 47.48 |
