| 序号 |
时间(年) |
数据(单位：‰) |
| 1 |
2025 |
|
| 2 |
2024 |
|
| 3 |
2023 |
|
| 4 |
2022 |
|
| 5 |
2021 |
|
| 6 |
2020 |
|
| 7 |
2019 |
10.22 |
| 8 |
2018 |
13.39 |
| 9 |
2017 |
15.53 |
| 10 |
2016 |
17.81 |
| 11 |
2015 |
14.81 |
| 12 |
2014 |
20.24 |
| 13 |
2013 |
21.19 |
| 14 |
2012 |
19.71 |
| 15 |
2011 |
18.23 |
| 16 |
2010 |
22.52 |
| 17 |
2009 |
19.21 |
| 18 |
2008 |
18.08 |
| 19 |
2007 |
20.29 |
| 20 |
2006 |
14.93 |
| 21 |
2005 |
13.60 |
| 22 |
2004 |
14.53 |
| 23 |
2003 |
9.46 |
| 24 |
2002 |
7.74 |
| 25 |
2001 |
7.72 |
| 26 |
2000 |
18.91 |
| 27 |
1999 |
8.20 |
| 28 |
1998 |
10.48 |
| 29 |
1997 |
11.57 |
| 30 |
1996 |
9.52 |
| 31 |
1995 |
9.82 |
| 32 |
1994 |
13.51 |
| 33 |
1993 |
11.99 |
| 34 |
1992 |
12.37 |
| 35 |
1991 |
19.23 |
| 36 |
1990 |
20.09 |
| 37 |
1989 |
22.58 |
| 38 |
1988 |
23.04 |
| 39 |
1987 |
15.40 |
| 40 |
1986 |
13.64 |
| 41 |
1985 |
12.17 |
| 42 |
1984 |
14.10 |
| 43 |
1983 |
14.29 |
| 44 |
1982 |
17.60 |
| 45 |
1981 |
18.03 |
| 46 |
1980 |
19.19 |
| 47 |
1979 |
13.15 |
| 48 |
1978 |
16.03 |
| 49 |
1975 |
20.50 |
| 50 |
1970 |
33.26 |
| 51 |
1965 |
37.48 |
| 52 |
1962 |
35.89 |
| 53 |
1957 |
31.19 |
| 54 |
1952 |
33.65 |
| 55 |
1949 |
24.95 |
