| 序号 |
时间(年) |
数据(单位：‰) |
| 1 |
2025 |
|
| 2 |
2024 |
|
| 3 |
2023 |
|
| 4 |
2022 |
|
| 5 |
2021 |
|
| 6 |
2020 |
|
| 7 |
2019 |
14.01 |
| 8 |
2018 |
17.71 |
| 9 |
2017 |
22.73 |
| 10 |
2016 |
17.20 |
| 11 |
2015 |
16.73 |
| 12 |
2014 |
20.47 |
| 13 |
2013 |
19.40 |
| 14 |
2012 |
13.84 |
| 15 |
2011 |
12.86 |
| 16 |
2010 |
18.19 |
| 17 |
2009 |
11.74 |
| 18 |
2008 |
16.41 |
| 19 |
2007 |
12.55 |
| 20 |
2006 |
10.03 |
| 21 |
2005 |
9.93 |
| 22 |
2004 |
9.31 |
| 23 |
2003 |
8.78 |
| 24 |
2002 |
10.03 |
| 25 |
2001 |
11.63 |
| 26 |
2000 |
16.42 |
| 27 |
1999 |
13.54 |
| 28 |
1998 |
12.17 |
| 29 |
1997 |
13.04 |
| 30 |
1996 |
16.81 |
| 31 |
1995 |
13.57 |
| 32 |
1994 |
12.94 |
| 33 |
1993 |
13.53 |
| 34 |
1992 |
11.98 |
| 35 |
1991 |
16.39 |
| 36 |
1990 |
22.66 |
| 37 |
1989 |
16.81 |
| 38 |
1988 |
18.29 |
| 39 |
1987 |
15.45 |
| 40 |
1986 |
18.23 |
| 41 |
1985 |
16.29 |
| 42 |
1984 |
17.18 |
| 43 |
1983 |
17.90 |
| 44 |
1982 |
18.80 |
| 45 |
1981 |
18.39 |
| 46 |
1980 |
17.36 |
| 47 |
1979 |
19.59 |
| 48 |
1978 |
22.10 |
| 49 |
1975 |
28.70 |
| 50 |
1970 |
35.60 |
| 51 |
1965 |
43.40 |
| 52 |
1962 |
43.30 |
| 53 |
1957 |
43.60 |
