| 年度 | 实际值 |
|---|---|
| 1992 | 28.51 |
| 1993 | 29.03 |
| 1994 | 30.07 |
| 1995 | 30.63 |
| 1996 | 31.17 |
| 1997 | 31.9 |
| 1998 | 32.43 |
| 1999 | 33.52 |
| 2000 | 59.09 |
| 2001 | 59.92 |
| 2002 | 61.15 |
| 2003 | 63.86 |
| 2004 | 64.46 |
| 2005 | 64.84 |
| 2006 | 64.89 |
| 2007 | 64.99 |
| 2008 | 64.9 |
| 2009 | 64.9 |
| 2010 | 65.04 |
| 2011 | 65.26 |
| 2012 | 65.55 |
| 2013 | 216.71 |
| 2014 | 217.78 |
| 2015 | 218.44 |
| 2016 | 219.752 |
| 2017 | 221 |
| 2018 | 223 |