| 年度 | 实际值 |
|---|---|
| 1992 | 35.8 |
| 1993 | |
| 1994 | |
| 1995 | 36.7 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 36.69 |
| 2000 | 378151 |
| 2001 | 361931 |
| 2002 | 34.5696 |
| 2003 | 35.8073 |
| 2004 | 35.9907 |
| 2005 | 36.3803 |
| 2006 | 35.69 |
| 2007 | 35.67 |
| 2008 | 35.61 |
| 2009 | 35.3091 |
| 2010 | 35.5028 |
| 2011 | 35.693 |
| 2012 | 35.81 |
| 2013 | 35.47 |
| 2014 | 36.42 |
| 2015 | 33.65 |
| 2016 | 33.92 |