| 年度 | 实际值 |
|---|---|
| 1978 | 4837 |
| 1979 | 6322 |
| 1980 | 6489 |
| 1981 | 6342 |
| 1982 | 8015 |
| 1983 | 8176 |
| 1984 | 9210 |
| 1985 | 10252 |
| 1986 | 10786 |
| 1987 | 9956 |
| 1988 | 11520 |
| 1989 | 12337 |
| 1990 | 11807 |
| 1991 | 11852 |
| 1992 | 10282 |
| 1993 | 9200 |
| 1994 | 10453 |
| 1995 | 12281 |
| 1996 | 12405 |
| 1997 | 14054 |
| 1998 | 14627 |
| 1999 | 16133 |
| 2000 | 19074 |
| 2001 | 23245 |
| 2002 | 17260 |
| 2003 | 15993 |
| 2004 | 16243 |
| 2005 | 16788 |
| 2006 | 15936 |
| 2007 | 17133 |
| 2008 | 22540 |
| 2009 | 20673 |
| 2010 | 18076 |
| 2011 | 17986 |
| 2012 | 13872 |
| 2013 | 12988 |
| 2014 | 12409 |
| 2015 | 12309 |