| 年度 | 实际值 |
|---|---|
| 1992 | 5769 |
| 1993 | |
| 1994 | |
| 1995 | 3872 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 18957 |
| 2000 | 19322 |
| 2001 | 16576 |
| 2002 | 17909 |
| 2003 | 19238 |
| 2004 | 22864 |
| 2005 | 23081 |
| 2006 | 30293 |
| 2007 | 35499 |
| 2008 | 51268 |
| 2009 | 73685 |
| 2010 | 86494 |
| 2011 | 102506 |
| 2012 | 122302 |
| 2013 | 159645 |
| 2014 | 191808 |
| 2015 | 230201 |
| 2016 | 252406 |