| 序号 |
时间(年) |
数据(单位：‰) |
| 1 |
2025 |
|
| 2 |
2024 |
|
| 3 |
2023 |
|
| 4 |
2021 |
|
| 5 |
2020 |
|
| 6 |
2019 |
|
| 7 |
2018 |
1.25 |
| 8 |
2017 |
2.60 |
| 9 |
2016 |
1.83 |
| 10 |
2015 |
0.23 |
| 11 |
2014 |
2.14 |
| 12 |
2013 |
2.28 |
| 13 |
2012 |
2.63 |
| 14 |
2011 |
2.50 |
| 15 |
2010 |
2.60 |
| 16 |
2009 |
2.60 |
| 17 |
2008 |
2.19 |
| 18 |
2007 |
2.05 |
| 19 |
2006 |
1.60 |
| 20 |
2005 |
1.43 |
| 21 |
2004 |
1.34 |
| 22 |
2003 |
1.10 |
| 23 |
2002 |
1.45 |
| 24 |
2001 |
1.64 |
| 25 |
2000 |
1.55 |
| 26 |
1999 |
2.95 |
| 27 |
1998 |
3.40 |
| 28 |
1997 |
3.03 |
| 29 |
1996 |
3.56 |
| 30 |
1995 |
4.00 |
| 31 |
1994 |
4.79 |
| 32 |
1993 |
4.51 |
| 33 |
1992 |
6.50 |
| 34 |
1991 |
6.16 |
| 35 |
1990 |
9.83 |
| 36 |
1989 |
9.01 |
| 37 |
1988 |
10.27 |
| 38 |
1987 |
10.99 |
| 39 |
1986 |
9.29 |
| 40 |
1985 |
8.15 |
| 41 |
1984 |
10.24 |
| 42 |
1983 |
11.73 |
| 43 |
1982 |
14.41 |
| 44 |
1981 |
11.91 |
| 45 |
1980 |
7.25 |
| 46 |
1979 |
8.63 |
| 47 |
1978 |
9.21 |
