| 年度 | 实际值 |
|---|---|
| 1992 | 40.58 |
| 1993 | 43.28 |
| 1994 | 46.29 |
| 1995 | 48.3 |
| 1996 | 49.93 |
| 1997 | 51.41 |
| 1998 | 52.79 |
| 1999 | 54.38 |
| 2000 | 57.4 |
| 2001 | 60.2 |
| 2002 | 63.88 |
| 2003 | 139.19 |
| 2004 | 143.07 |
| 2005 | 147.3 |
| 2006 | 176.68 |
| 2007 | 152.94 |
| 2008 | 155.82 |
| 2009 | |
| 2010 | 158.24 |
| 2011 | 162.4 |
| 2012 | 161.6 |
| 2013 | 163.2 |
| 2014 | 165.3 |
| 2015 | 164.8 |
| 2016 | 167 |
| 2017 | 171 |
| 2018 | 178 |