| 年度 | 实际值 |
|---|---|
| 1992 | 464 |
| 1993 | |
| 1994 | |
| 1995 | 1442 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 8711 |
| 2000 | 1781 |
| 2001 | 5852 |
| 2002 | 5142.1 |
| 2003 | 6126 |
| 2004 | 1908 |
| 2005 | 5001 |
| 2006 | 1378 |
| 2007 | 4884 |
| 2008 | 9900 |
| 2009 | 9613 |
| 2010 | 12826 |
| 2011 | 18573 |
| 2012 | 22324 |
| 2013 | 31939 |
| 2014 | 37653 |
| 2015 | 33800 |
| 2016 | 46252 |
| 2017 | 60969 |