| 序号 | 时间 (年) |
数据 (‰) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | |
| 7 | 2018 | |
| 8 | 2017 | |
| 9 | 2016 | |
| 10 | 2015 | |
| 11 | 2014 | 23.10 |
| 12 | 2013 | 22.90 |
| 13 | 2012 | 22.80 |
| 14 | 2011 | 22.90 |
| 15 | 2010 | 23.10 |
| 16 | 2009 | 23.40 |
| 17 | 2008 | 23.80 |
| 18 | 2007 | 24.30 |
| 19 | 2006 | 25.10 |
| 20 | 2005 | 25.90 |
| 21 | 2004 | 26.90 |
| 22 | 2003 | 27.80 |
| 23 | 2002 | 28.60 |
| 24 | 2001 | 29.40 |
| 25 | 2000 | 30.00 |
| 26 | 1999 | 30.40 |
| 27 | 1998 | 30.70 |
| 28 | 1997 | 30.70 |
| 29 | 1996 | 30.50 |
| 30 | 1995 | 30.10 |
| 31 | 1994 | 29.50 |
| 32 | 1993 | 28.80 |
| 33 | 1992 | 28.10 |
| 34 | 1991 | 27.30 |
| 35 | 1990 | 26.60 |
| 36 | 1989 | 26.20 |
| 37 | 1988 | 26.00 |
| 38 | 1987 | 27.90 |
| 39 | 1986 | 28.20 |
| 40 | 1985 | 28.80 |
