| 年度 | 实际值 |
|---|---|
| 1993 | 2112 |
| 1994 | 2130 |
| 1995 | 2187 |
| 1996 | 1769 |
| 1997 | 2026 |
| 1998 | 1653 |
| 1999 | 1339 |
| 2000 | 1638 |
| 2001 | 1652 |
| 2002 | 1494 |
| 2003 | 1538 |
| 2004 | 1326 |
| 2005 | 1326 |
| 2006 | 1627 |
| 2007 | 2212 |
| 2008 | 2219 |
| 2009 | |
| 2010 | 2189 |
| 2011 | 2266 |
| 2012 | 2368 |
| 2013 | 2240 |
| 2014 | 2505 |
| 2015 | 2599 |
| 2016 | 2831 |
| 2017 | 3319 |
| 2018 | 3605 |