| 序号 |
时间(年) |
数据(单位：‰) |
| 1 |
2024 |
|
| 2 |
2023 |
|
| 3 |
2022 |
|
| 4 |
2021 |
|
| 5 |
2020 |
|
| 6 |
2019 |
|
| 7 |
2018 |
2.70 |
| 8 |
2017 |
2.90 |
| 9 |
2016 |
3.10 |
| 10 |
2015 |
3.30 |
| 11 |
2014 |
3.60 |
| 12 |
2013 |
4.00 |
| 13 |
2012 |
4.40 |
| 14 |
2011 |
4.80 |
| 15 |
2010 |
5.30 |
| 16 |
2009 |
5.90 |
| 17 |
2008 |
6.50 |
| 18 |
2007 |
7.20 |
| 19 |
2006 |
7.90 |
| 20 |
2005 |
8.60 |
| 21 |
2004 |
9.30 |
| 22 |
2003 |
10.00 |
| 23 |
2002 |
10.70 |
| 24 |
2001 |
11.30 |
| 25 |
2000 |
11.70 |
| 26 |
1999 |
12.10 |
| 27 |
1998 |
12.40 |
| 28 |
1997 |
12.60 |
| 29 |
1996 |
12.60 |
| 30 |
1995 |
12.70 |
| 31 |
1994 |
12.70 |
| 32 |
1993 |
12.80 |
| 33 |
1992 |
13.00 |
| 34 |
1991 |
13.40 |
| 35 |
1990 |
14.00 |
| 36 |
1989 |
14.90 |
| 37 |
1988 |
16.10 |
| 38 |
1987 |
17.50 |
| 39 |
1986 |
19.20 |
| 40 |
1985 |
21.10 |
| 41 |
1984 |
23.30 |
