| 年度 | 实际值 |
|---|---|
| 1990 | 4620 |
| 1991 | 3650 |
| 1992 | 5810 |
| 1993 | 9315 |
| 1994 | 13869 |
| 1995 | 15908 |
| 1996 | 19564 |
| 1997 | 22942 |
| 1998 | 23509 |
| 1999 | 25171 |
| 2000 | 27605 |
| 2001 | 31010 |
| 2002 | 33629 |
| 2003 | 37697 |
| 2004 | 42195 |
| 2005 | 53082 |
| 2006 | 70433 |
| 2007 | 92784 |
| 2008 | 106121 |
| 2009 | 116301 |
| 2010 | 131059 |
| 2011 | 161873 |
| 2012 | 188025 |
| 2013 | 201698 |
| 2014 | 220007 |
| 2015 | 220100 |
| 2016 | 227300 |
| 2017 | 234959 |