| 年度 | 实际值 |
|---|---|
| 1995 | 25.4 |
| 1996 | 7.4 |
| 1997 | 5 |
| 1998 | 8.1 |
| 1999 | -32.15 |
| 2000 | 1.3 |
| 2001 | 10.3 |
| 2002 | 21.3 |
| 2003 | 22.6 |
| 2004 | 37.6 |
| 2005 | 6.4 |
| 2006 | 10.7 |
| 2007 | 26.2549223972242 |
| 2008 | 10.0205906577245 |
| 2009 | 6.59999999999999 |
| 2010 | 10.9 |
| 2011 | 15.8273644287667 |
| 2012 | 7.6 |
| 2013 | 120. |
| 2014 | 7.6 |
| 2015 | 8.25868317835889 |
| 2016 | |
| 2017 | 5.87 |
| 2018 | 0.5 |