| 年度 | 实际值 |
|---|---|
| 1992 | 98 |
| 1993 | |
| 1994 | |
| 1995 | 14801 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 26637 |
| 2000 | 24538 |
| 2001 | 27798 |
| 2002 | 23709 |
| 2003 | 25831 |
| 2004 | 26469 |
| 2005 | 26659 |
| 2006 | 19708 |
| 2007 | 25969 |
| 2008 | 31996 |
| 2009 | 46783 |
| 2010 | 67499 |
| 2011 | 88853 |
| 2012 | 121491 |
| 2013 | 136091 |
| 2014 | 146280 |
| 2015 | 172926 |
| 2016 | 267285 |
| 2017 | 328796 |