| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.045 | 131 |
| 2015 | 1.143 | 144 |
| 2014 | 1.219 | 149 |
| 2013 | 1.304 | 150 |
| 2012 | 1.408 | 152 |
| 2011 | 1.501 | 151 |
| 2010 | 1.598 | 155 |
| 2009 | 1.723 | 156 |
| 2008 | 1.91 | 158 |
| 2007 | 1.883 | 165 |
| 2006 | 1.665 | 166 |
| 2005 | 1.677 | 165 |
| 2004 | 1.767 | 157 |
| 2003 | 1.822 | 154 |
| 2002 | 1.865 | 152 |
| 2001 | 1.969 | 149 |
| 2000 | 2.067 | 149 |
| 1999 | 2.161 | 151 |
| 1998 | 2.321 | 145 |
| 1997 | 2.449 | 140 |
| 1996 | 2.658 | 138 |
| 1995 | 3.506 | 133 |
| 1994 | 4.133 | 127 |
| 1993 | 4.864 | 122 |
| 1992 | 6.151 | 111 |
| 1991 | 7.53 | 105 |
| 1990 | 6.864 | 103 |
| 1989 | 5.287 | 106 |
| 1988 | 5.034 | 105 |
| 1987 | 5.208 | 104 |
| 1986 | 6.02 | 100 |