| 年度 | 实际值 |
|---|---|
| 1986 | 730 |
| 1987 | 1023 |
| 1988 | 1325 |
| 1989 | 1411 |
| 1990 | 1652 |
| 1991 | 2033 |
| 1992 | 2375 |
| 1993 | 2960 |
| 1994 | 3539 |
| 1995 | 5226 |
| 1996 | 6215 |
| 1997 | 6510 |
| 1998 | 6708 |
| 1999 | 7271 |
| 2000 | 7760 |
| 2001 | 8494 |
| 2002 | 6450 |
| 2003 | 6990 |
| 2004 | 7479 |
| 2005 | 8041 |
| 2006 | 8987 |
| 2007 | 10202 |
| 2008 | 11296 |
| 2009 | 12210 |
| 2010 | 13687 |
| 2011 | 15836 |
| 2012 | 17596 |
| 2013 | 19391 |
| 2014 | 23434 |
| 2015 | 25632 |