| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 74.15 | 46 |
| 2015 | 72.11 | 59 |
| 2014 | 90.06 | 39 |
| 2013 | 84.46 | 50 |
| 2012 | 90.48 | 44 |
| 2011 | 109.66 | 25 |
| 2010 | 85.92 | 41 |
| 2009 | 88 | 33 |
| 2008 | 109.46 | 29 |
| 2007 | 94.6 | 44 |
| 2006 | 88.7 | 43 |
| 2005 | 89.14 | 42 |
| 2004 | 94.92 | 36 |
| 2003 | 88.82 | 39 |
| 2002 | 86.98 | 38 |
| 2001 | 91.4 | 31 |
| 2000 | 101.24 | 24 |
| 1999 | 91.43 | 26 |
| 1998 | 85.82 | 33 |
| 1997 | 87.81 | 31 |
| 1996 | 65.02 | 67 |
| 1995 | 61.15 | 74 |
| 1994 | 66.32 | 54 |
| 1993 | 99.17 | 13 |
| 1992 | 61.25 | 53 |
| 1991 | 29.8 | 124 |
| 1990 | 61.9 | 52 |
| 1989 | 47.08 | 83 |
| 1988 | 57.79 | 53 |
| 1987 | 60.29 | 47 |
| 1986 | 64.05 | 38 |