| 年度 | 实际值 |
|---|---|
| 1993 | 1127 |
| 1994 | 1193 |
| 1995 | 1298 |
| 1996 | 1249 |
| 1997 | 896 |
| 1998 | 932 |
| 1999 | 950 |
| 2000 | 996 |
| 2001 | 1650 |
| 2002 | 1852 |
| 2003 | 1876 |
| 2004 | 2058 |
| 2005 | 2098 |
| 2006 | 2182 |
| 2007 | 2795 |
| 2008 | 2771 |
| 2009 | 2864 |
| 2010 | 3102 |
| 2011 | 3260 |
| 2012 | 2772 |
| 2013 | 3601 |
| 2014 | 3720 |
| 2015 | 3895 |
| 2016 | 4148 |
| 2017 | 4320 |
| 2018 | 4526 |