| 年度 | 实际值 |
|---|---|
| 1992 | 5950 |
| 1993 | |
| 1994 | |
| 1995 | 7537 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 13419 |
| 2000 | 12725 |
| 2001 | 13723 |
| 2002 | 15340 |
| 2003 | 18048 |
| 2004 | 19363 |
| 2005 | 20995 |
| 2006 | 16998 |
| 2007 | 17605 |
| 2008 | 13513 |
| 2009 | 17006 |
| 2010 | 20315 |
| 2011 | 25042 |
| 2012 | 33403 |
| 2013 | 36724 |
| 2014 | 41139 |
| 2015 | 36737 |
| 2016 | 39387 |
| 2017 | 45913 |