| 年度 | 实际值 |
|---|---|
| 1993 | 822 |
| 1994 | 2024 |
| 1995 | 2050 |
| 1996 | 1892 |
| 1997 | 2044 |
| 1998 | 1854 |
| 1999 | 2096 |
| 2000 | 1948 |
| 2001 | 1947 |
| 2002 | 1673 |
| 2003 | 1719 |
| 2004 | 2488 |
| 2005 | 2230 |
| 2006 | 2330 |
| 2007 | 7142 |
| 2008 | 1922 |
| 2009 | |
| 2010 | 3121 |
| 2011 | 33869 |
| 2012 | 3695 |
| 2013 | 7807 |
| 2014 | 4519 |
| 2015 | 4979 |
| 2016 | 5132 |
| 2017 | 5316 |
| 2018 | 5653 |