| 序号 | 时间 (年) |
数据 (张) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 53.32 |
| 8 | 2014 | 51.51 |
| 9 | 2013 | 48.07 |
| 10 | 2012 | 44.50 |
| 11 | 2011 | 40.80 |
| 12 | 2010 | 40.38 |
| 13 | 2009 | 36.05 |
| 14 | 2008 | 33.85 |
| 15 | 2007 | 30.76 |
| 16 | 2006 | 29.38 |
| 17 | 2005 | 29.10 |
| 18 | 2004 | 28.00 |
| 19 | 2003 | 27.37 |
| 20 | 2002 | 27.30 |
| 21 | 2001 | 28.75 |
| 22 | 2000 | 28.24 |
| 23 | 1999 | 28.10 |
| 24 | 1998 | 26.76 |
| 25 | 1997 | 26.73 |
| 26 | 1996 | 26.86 |
| 27 | 1995 | 27.25 |
| 28 | 1994 | 27.17 |
| 29 | 1993 | 27.28 |
| 30 | 1992 | 27.52 |
| 31 | 1991 | 27.14 |
| 32 | 1990 | 26.62 |
| 33 | 1989 | 26.75 |
| 34 | 1988 | 26.68 |
| 35 | 1987 | 26.30 |
| 36 | 1986 | 25.41 |
| 37 | 1985 | 25.20 |
| 38 | 1984 | 24.84 |
| 39 | 1983 | 24.92 |
| 40 | 1982 | 24.44 |
| 41 | 1981 | 25.19 |
| 42 | 1980 | 25.19 |
| 43 | 1979 | 25.11 |
| 44 | 1978 | 24.23 |
| 45 | 1975 | 21.87 |
| 46 | 1970 | 16.66 |
| 47 | 1965 | 12.20 |
| 48 | 1957 | 6.09 |
| 49 | 1952 | 1.78 |
| 50 | 1949 | 1.05 |
