| 年度 | 实际值 |
|---|---|
| 1992 | 25.56 |
| 1993 | 26.3 |
| 1994 | 27.49 |
| 1995 | 28.58 |
| 1996 | 30.29 |
| 1997 | 142.26 |
| 1998 | 143.53 |
| 1999 | 144.62 |
| 2000 | 144.93 |
| 2001 | 149.38 |
| 2002 | 151.91 |
| 2003 | 154.45 |
| 2004 | 156.43 |
| 2005 | 159.5 |
| 2006 | 164.12 |
| 2007 | 167.04 |
| 2008 | 170.22 |
| 2009 | |
| 2010 | 173.2 |
| 2011 | 179.3 |
| 2012 | 181.1 |
| 2013 | 183.3 |
| 2014 | 180.5 |
| 2015 | 181.86 |
| 2016 | 184 |
| 2017 | 186 |
| 2018 | 188 |