| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 52.25 | 92 |
| 2015 | 67.77 | 70 |
| 2014 | 103.44 | 24 |
| 2013 | 93.88 | 41 |
| 2012 | 87.44 | 49 |
| 2011 | 86.14 | 53 |
| 2010 | 84.38 | 46 |
| 2009 | 72.09 | 59 |
| 2008 | 90.42 | 49 |
| 2007 | 75.04 | 72 |
| 2006 | 80.52 | 58 |
| 2005 | 76.76 | 66 |
| 2004 | 78.42 | 54 |
| 2003 | 80.87 | 45 |
| 2002 | 76.84 | 52 |
| 2001 | 85.72 | 41 |
| 2000 | 84.02 | 45 |
| 1999 | 77.85 | 47 |
| 1998 | 74.48 | 52 |
| 1997 | 75.77 | 49 |
| 1996 | 81.48 | 37 |
| 1995 | 76.69 | 40 |
| 1994 | 77.47 | 32 |
| 1993 | 71.54 | 41 |
| 1992 | 70.05 | 43 |
| 1991 | 79.63 | 27 |
| 1990 | 93.57 | 20 |
| 1989 | 90.89 | 26 |
| 1988 | 80.45 | 26 |
| 1987 | 64.44 | 39 |
| 1986 | 59.76 | 45 |