| 年度 | 实际值 |
|---|---|
| 1978 | 9802 |
| 1979 | 10226 |
| 1980 | 11627 |
| 1981 | 10487 |
| 1982 | 10142 |
| 1983 | 9288 |
| 1984 | 9976 |
| 1985 | 10401 |
| 1986 | 10506 |
| 1987 | 10216 |
| 1988 | 10576 |
| 1989 | 10558 |
| 1990 | 10939 |
| 1991 | 10217 |
| 1992 | 13127 |
| 1993 | 9827 |
| 1994 | 7837 |
| 1995 | 7798 |
| 1996 | 6957 |
| 1997 | 7493 |
| 1998 | 7475 |
| 1999 | 7623 |
| 2000 | 7713 |
| 2001 | 8358 |
| 2002 | 8508 |
| 2003 | 8779 |
| 2004 | 8840 |
| 2005 | 9234 |
| 2006 | 8407 |
| 2007 | 9356 |
| 2008 | 11338 |
| 2009 | 13337 |
| 2010 | 16947 |
| 2011 | 16530 |
| 2012 | 15416 |
| 2013 | 14119 |
| 2014 | 15158 |
| 2015 | 17767 |