| 年度 | 实际值 |
|---|---|
| 2000 | 99.83 |
| 2001 | 99.6 |
| 2002 | 100.2 |
| 2003 | 100.89025007462 |
| 2004 | 100.412278448497 |
| 2005 | 99.2541758705418 |
| 2006 | 98.367152064932 |
| 2007 | 98.4856097874479 |
| 2008 | 98.8675495158196 |
| 2009 | 99.1522304276808 |
| 2010 | 98.7874709129899 |
| 2011 | 98.18 |
| 2012 | 97.3945954470189 |
| 2013 | |
| 2014 | 97.02 |
| 2015 | 96.7743242285217 |