| 年度 | 实际值 |
|---|---|
| 1990 | 24504 |
| 1991 | 29532 |
| 1992 | 32308 |
| 1993 | 24216 |
| 1994 | 30399 |
| 1995 | 42623 |
| 1996 | 44563 |
| 1997 | 45029 |
| 1998 | 46446 |
| 1999 | 46807 |
| 2000 | 47971 |
| 2001 | 31930 |
| 2002 | 26891 |
| 2003 | 28484 |
| 2004 | 30430 |
| 2005 | 34256 |
| 2006 | 34323 |
| 2007 | 38295 |
| 2008 | 45043 |
| 2009 | 49247 |
| 2010 | 52579 |
| 2011 | 56864 |
| 2012 | 58250 |
| 2013 | 54756 |
| 2014 | 58556 |
| 2015 | 60200 |