| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.207 | 112 |
| 2015 | 1.696 | 123 |
| 2014 | 2.057 | 125 |
| 2013 | 2.169 | 126 |
| 2012 | 3.217 | 108 |
| 2011 | 1.971 | 138 |
| 2010 | 2.203 | 123 |
| 2009 | -.5 | 112 |
| 2008 | 1.489 | 137 |
| 2007 | 4.805 | 121 |
| 2006 | 5.345 | 94 |
| 2005 | 4.167 | 105 |
| 2004 | 4.14 | 106 |
| 2003 | 1.416 | 129 |
| 2002 | 1.122 | 134 |
| 2001 | 2.189 | 113 |
| 2000 | 2.983 | 114 |
| 1999 | 3.812 | 76 |
| 1998 | 6.111 | 32 |
| 1997 | 4.643 | 77 |
| 1996 | 3.654 | 78 |
| 1995 | 2.462 | 88 |
| 1994 | 3.647 | 63 |
| 1993 | 3.341 | 60 |
| 1992 | 1.992 | 80 |
| 1991 | 3.253 | 53 |
| 1990 | 2.169 | 73 |
| 1989 | -1.286 | 95 |
| 1988 | 1.271 | 85 |
| 1987 | 0.994 | 86 |
| 1986 | 3.592 | 54 |