| 年度 | 实际值 |
|---|---|
| 1992 | 975 |
| 1993 | 976 |
| 1994 | 977 |
| 1995 | 980 |
| 1996 | 981 |
| 1997 | 983 |
| 1998 | 984 |
| 1999 | 982 |
| 2000 | 980.54 |
| 2001 | 977.95 |
| 2002 | 975.2 |
| 2003 | 971.9 |
| 2004 | 967.11661 |
| 2005 | 963 |
| 2006 | 962.117235345582 |
| 2007 | 957.548556430446 |
| 2008 | 954.530683664542 |
| 2009 | 953.205849268841 |
| 2010 | 953.530808648919 |
| 2011 | 955.979252593426 |
| 2012 | 912.051436716636 |
| 2013 | 912 |
| 2014 | 692 |
| 2015 | 692 |