| 年度 | 实际值 |
|---|---|
| 1986 | 41300 |
| 1987 | 34200 |
| 1988 | 38100 |
| 1989 | 38900 |
| 1990 | 37100 |
| 1991 | 36600 |
| 1992 | 33900 |
| 1993 | 29400 |
| 1994 | 28100 |
| 1995 | 27400 |
| 1996 | 24700 |
| 1997 | 27400 |
| 1998 | 25600 |
| 1999 | 26900 |
| 2000 | 19800 |
| 2001 | 64700 |
| 2002 | 52900 |
| 2003 | 58000 |
| 2004 | 55700 |
| 2005 | 56400 |
| 2006 | 38800 |
| 2007 | 31600 |
| 2008 | 40800 |
| 2009 | 37800 |
| 2010 | 35000 |
| 2011 | 32400 |
| 2012 | 31900 |
| 2013 | 37200 |
| 2014 | 36600 |
| 2015 | 25400 |