| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.31 | 107 |
| 2015 | 0.08 | 137 |
| 2014 | 4.57 | 127 |
| 2013 | 4.08 | 132 |
| 2012 | 13 | 59 |
| 2011 | 11.23 | 79 |
| 2010 | 5.5 | 129 |
| 2009 | 7.61 | 103 |
| 2008 | 4.02 | 145 |
| 2007 | 3.33 | 157 |
| 2006 | 4.61 | 155 |
| 2005 | 6.89 | 135 |
| 2004 | 2.85 | 151 |
| 2003 | 8.36 | 111 |
| 2002 | 5.73 | 117 |
| 2001 | 3.91 | 142 |
| 2000 | -16.93 | 159 |
| 1999 | 13.28 | 84 |
| 1998 | 5.1 | 113 |
| 1997 | 6.62 | 127 |
| 1996 | 9.57 | 105 |
| 1995 | 4.61 | 127 |
| 1994 | 4.16 | 132 |
| 1993 | 8.9 | 89 |
| 1992 | 2.6 | 117 |
| 1991 | 2.33 | 112 |
| 1990 | 0.83 | 109 |
| 1989 | 6.28 | 103 |
| 1988 | 5.42 | 103 |
| 1987 | 10.57 | 80 |
| 1986 | 3.33 | 104 |