| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 82.53 | 37 |
| 2015 | 113.4 | 18 |
| 2014 | 60.09 | 96 |
| 2013 | 54.1 | 115 |
| 2012 | 52.63 | 121 |
| 2011 | 69.78 | 80 |
| 2010 | 71.53 | 66 |
| 2009 | 52.77 | 105 |
| 2008 | 87.8 | 54 |
| 2007 | 58.16 | 116 |
| 2006 | 56.18 | 119 |
| 2005 | 59.43 | 101 |
| 2004 | 53.55 | 114 |
| 2003 | 43.31 | 136 |
| 2002 | 72.84 | 61 |
| 2001 | 26.64 | 171 |
| 2000 | 36.46 | 150 |
| 1999 | 59.57 | 79 |
| 1998 | 78.8 | 46 |
| 1997 | 60.48 | 75 |
| 1996 | 45.28 | 118 |
| 1995 | 53.23 | 91 |
| 1994 | 75.99 | 36 |
| 1993 | 70.5 | 44 |
| 1992 | 53.06 | 66 |
| 1991 | 48.81 | 71 |
| 1990 | 58.36 | 57 |