| 年度 | 实际值 |
|---|---|
| 1978 | 306 |
| 1979 | |
| 1980 | |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 464 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 1490 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 4013 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 4221 |
| 2000 | 4556 |
| 2001 | 5048 |
| 2002 | 5170 |
| 2003 | 5885 |
| 2004 | 6979 |
| 2005 | 8180 |
| 2006 | 10018 |
| 2007 | 12168 |
| 2008 | 14373 |
| 2009 | 16977 |
| 2010 | 20016 |
| 2011 | 23000 |
| 2012 | 27100 |
| 2013 | 31900 |
| 2014 | 38300 |