| 年度 | 实际值 |
|---|---|
| 1992 | 34338 |
| 1993 | |
| 1994 | |
| 1995 | 34945 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 35431 |
| 2000 | 34950 |
| 2001 | 31700 |
| 2002 | 33070 |
| 2003 | 28520 |
| 2004 | 28030 |
| 2005 | 30020 |
| 2006 | 30140 |
| 2007 | 30486.2765478669 |
| 2008 | 30460 |
| 2009 | 31381 |
| 2010 | 3144.9 |
| 2011 | 31400 |
| 2012 | 31890 |
| 2013 | 32140 |
| 2014 | 31440 |
| 2015 | 32321 |