| 年度 | 实际值 |
|---|---|
| 1982 | 724 |
| 1983 | 583 |
| 1984 | 715 |
| 1985 | 984 |
| 1986 | 1145 |
| 1987 | 1233 |
| 1988 | 1635 |
| 1989 | 1989 |
| 1990 | 2375 |
| 1991 | 2330 |
| 1992 | 2857 |
| 1993 | 4286 |
| 1994 | 6154 |
| 1995 | 7742 |
| 1996 | 7988 |
| 1997 | 9600 |
| 1998 | 10232 |
| 1999 | 11179 |
| 2000 | 13064 |
| 2001 | 15601 |
| 2002 | 18288 |
| 2003 | 20922 |
| 2004 | 16868 |
| 2005 | 23369 |
| 2006 | 23421 |
| 2007 | 25418 |
| 2008 | 29199 |
| 2009 | 31966 |
| 2010 | 36736 |
| 2011 | 45624 |
| 2012 | 50227 |
| 2013 | 57074 |
| 2014 | 60515 |
| 2015 | 70346 |