| 年度 | 实际值 |
|---|---|
| 1985 | 3083 |
| 1986 | 4735 |
| 1987 | 6670 |
| 1988 | 10274 |
| 1989 | 12497 |
| 1990 | 14545 |
| 1991 | 19325 |
| 1992 | 20105 |
| 1993 | 25540 |
| 1994 | 30292 |
| 1995 | 33778 |
| 1996 | 40169 |
| 1997 | 44844 |
| 1998 | 52382 |
| 1999 | 60658 |
| 2000 | 76893 |
| 2001 | 110934 |
| 2002 | 136836 |
| 2003 | 170192 |
| 2004 | 186004 |
| 2005 | 208405 |
| 2006 | 232561 |
| 2007 | 284617 |
| 2008 | 319589 |
| 2009 | 315768 |
| 2010 | 344894 |
| 2011 | 391659 |
| 2012 | 384745 |
| 2013 | 402737 |
| 2014 | 413882 |
| 2015 | 423136 |