| 年度 | 实际值 |
|---|---|
| 1981 | 6386 |
| 1982 | 7523 |
| 1983 | 7261 |
| 1984 | 7135 |
| 1985 | 8059 |
| 1986 | 10104 |
| 1987 | 10158 |
| 1988 | 9723 |
| 1989 | 9970 |
| 1990 | 10436 |
| 1991 | 10562 |
| 1992 | 11659 |
| 1993 | 10203 |
| 1994 | 12095 |
| 1995 | 12941 |
| 1996 | 11190 |
| 1997 | 9983 |
| 1998 | 9569 |
| 1999 | 9078 |
| 2000 | 8587 |
| 2001 | 9061 |
| 2002 | 11830 |
| 2003 | 11875 |
| 2004 | 11755 |
| 2005 | 13475 |
| 2006 | 9585 |
| 2007 | 9411 |
| 2008 | 12128 |
| 2009 | 13225 |
| 2010 | 13076 |
| 2011 | 15904 |
| 2012 | 15945 |
| 2013 | 17370 |
| 2014 | 17325 |
| 2015 | 17482 |