| 年度 | 实际值 |
|---|---|
| 1995 | 724 |
| 1996 | 252 |
| 1997 | 339 |
| 1998 | 363 |
| 1999 | 300 |
| 2000 | 0 |
| 2001 | 558 |
| 2002 | 3291 |
| 2003 | 23717 |
| 2004 | 22763 |
| 2005 | 32339 |
| 2006 | 17331 |
| 2007 | 34497 |
| 2008 | 85190 |
| 2009 | |
| 2010 | 117673 |
| 2011 | 122804 |
| 2012 | 194874 |
| 2013 | 224836 |
| 2014 | 226540 |
| 2015 | 259847 |
| 2016 | 379120 |
| 2017 | 419883 |
| 2018 | 255092 |