| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.84 | 103 |
| 2015 | 1.8 | 104 |
| 2014 | 1.74 | 104 |
| 2013 | 1.68 | 108 |
| 2012 | 1.61 | 113 |
| 2011 | 1.53 | 116 |
| 2010 | 1.48 | 120 |
| 2009 | 1.42 | 122 |
| 2008 | 1.26 | 132 |
| 2007 | 1.01 | 141 |
| 2006 | 0.73 | 157 |
| 2005 | 0.4 | 173 |
| 2004 | 0.12 | 183 |
| 2003 | 0.02 | 183 |
| 2002 | 0.17 | 182 |
| 2001 | 0.49 | 171 |
| 2000 | 0.93 | 148 |
| 1999 | 1.32 | 133 |
| 1998 | 1.6 | 118 |
| 1997 | 2.26 | 95 |
| 1996 | 2.28 | 95 |
| 1995 | 2.12 | 105 |
| 1994 | 2.02 | 111 |
| 1993 | 2.09 | 112 |
| 1992 | 2.4 | 105 |
| 1991 | 2.89 | 89 |
| 1990 | 3.51 | 77 |
| 1989 | 4.07 | 63 |
| 1988 | 4.43 | 55 |
| 1987 | 5.01 | 44 |
| 1986 | 7.94 | 5 |