| 年度 | 实际值 |
|---|---|
| 1993 | 4408 |
| 1994 | 4453 |
| 1995 | 4405 |
| 1996 | 4423 |
| 1997 | 4373 |
| 1998 | 4363 |
| 1999 | 4378 |
| 2000 | 4358 |
| 2001 | 4331 |
| 2002 | 3469 |
| 2003 | 4275 |
| 2004 | 3198 |
| 2005 | 3197 |
| 2006 | 2978 |
| 2007 | 3102 |
| 2008 | 3212 |
| 2009 | |
| 2010 | 3761 |
| 2011 | 5568 |
| 2012 | 3773 |
| 2013 | 4021 |
| 2014 | 4159 |
| 2015 | 4260 |
| 2016 | 4308 |
| 2017 | 4531 |
| 2018 | 4857 |