| 年度 | 实际值 |
|---|---|
| 1993 | 3239 |
| 1994 | 3871 |
| 1995 | 3158 |
| 1996 | 3026 |
| 1997 | 6874 |
| 1998 | 3025 |
| 1999 | 3569 |
| 2000 | 3770 |
| 2001 | 3674 |
| 2002 | 3317 |
| 2003 | 3395 |
| 2004 | 3291 |
| 2005 | 3269 |
| 2006 | 3204 |
| 2007 | 3677 |
| 2008 | 3629 |
| 2009 | |
| 2010 | 3917 |
| 2011 | 3996 |
| 2012 | 3972 |
| 2013 | 4024 |
| 2014 | 3891 |
| 2015 | 3986 |
| 2016 | 4187 |
| 2017 | 4593 |
| 2018 | 4908 |