| 序号 | 时间 (年) |
数据 (‰) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | |
| 7 | 2018 | 27.70 |
| 8 | 2017 | 27.90 |
| 9 | 2016 | 27.80 |
| 10 | 2015 | 27.50 |
| 11 | 2014 | 26.80 |
| 12 | 2013 | 25.80 |
| 13 | 2012 | 24.60 |
| 14 | 2011 | 23.30 |
| 15 | 2010 | 21.80 |
| 16 | 2009 | 20.40 |
| 17 | 2008 | 19.10 |
| 18 | 2007 | 18.10 |
| 19 | 2006 | 17.30 |
| 20 | 2005 | 16.80 |
| 21 | 2004 | 16.60 |
| 22 | 2003 | 17.10 |
| 23 | 2002 | 17.90 |
| 24 | 2001 | 19.30 |
| 25 | 2000 | 20.90 |
| 26 | 1999 | 22.60 |
| 27 | 1998 | 24.40 |
| 28 | 1997 | 26.20 |
| 29 | 1996 | 27.50 |
| 30 | 1995 | 28.30 |
| 31 | 1994 | 28.80 |
| 32 | 1993 | 29.10 |
| 33 | 1992 | 29.30 |
| 34 | 1991 | 29.40 |
| 35 | 1990 | 29.40 |
| 36 | 1989 | 29.40 |
| 37 | 1988 | 29.70 |
| 38 | 1987 | 30.00 |
| 39 | 1986 | 30.60 |
| 40 | 1985 | 31.30 |
| 41 | 1984 | 32.00 |
| 42 | 1983 | 32.40 |
| 43 | 1982 | 32.70 |
| 44 | 1981 | 32.90 |
| 45 | 1980 | 33.00 |
| 46 | 1979 | 33.00 |
| 47 | 1978 | 33.00 |
| 48 | 1977 | 33.10 |
| 49 | 1976 | 33.00 |
| 50 | 1975 | 32.80 |
| 51 | 1974 | 32.40 |
| 52 | 1973 | 31.90 |
| 53 | 1972 | 31.30 |
| 54 | 1971 | 30.80 |
| 55 | 1970 | 30.30 |
| 56 | 1969 | 30.00 |
