| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 65.7 | 93 |
| 2015 | 70.07 | 111 |
| 2014 | 90.21 | 83 |
| 2013 | 95.07 | 80 |
| 2012 | 102.05 | 73 |
| 2011 | 107.52 | 59 |
| 2010 | 105.34 | 58 |
| 2009 | 110.32 | 39 |
| 2008 | 127.54 | 39 |
| 2007 | 117.47 | 46 |
| 2006 | 118.77 | 43 |
| 2005 | 139.66 | 19 |
| 2004 | 124.4 | 31 |
| 2003 | 130.45 | 24 |
| 2002 | 124.96 | 26 |
| 2001 | 150.34 | 14 |
| 2000 | 152.46 | 13 |
| 1999 | 178.99 | 8 |
| 1998 | 129.87 | 18 |
| 1997 | 137.67 | 15 |
| 1996 | 152.11 | 12 |
| 1994 | 161.21 | 10 |
| 1993 | 109.29 | 29 |
| 1992 | 142.31 | 15 |
| 1991 | 50 | 108 |
| 1990 | 66.67 | 74 |
| 1989 | 66.67 | 63 |
| 1988 | 100 | 30 |
| 1987 | 100 | 29 |
| 1986 | 100 | 27 |