| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19 | 204 |
| 2015 | 18.62 | 205 |
| 2014 | 18.24 | 204 |
| 2013 | 17.88 | 204 |
| 2012 | 17.52 | 204 |
| 2011 | 17.17 | 205 |
| 2010 | 16.82 | 205 |
| 2009 | 16.48 | 205 |
| 2008 | 16.15 | 205 |
| 2007 | 15.82 | 205 |
| 2006 | 15.5 | 205 |
| 2005 | 15.18 | 205 |
| 2004 | 14.87 | 206 |
| 2003 | 14.56 | 207 |
| 2002 | 14.26 | 207 |
| 2001 | 13.97 | 207 |
| 2000 | 13.43 | 207 |
| 1999 | 12.89 | 208 |
| 1998 | 12.36 | 208 |
| 1997 | 11.86 | 208 |
| 1996 | 11.37 | 209 |
| 1995 | 10.9 | 208 |
| 1994 | 10.44 | 208 |
| 1993 | 10.01 | 208 |
| 1992 | 9.59 | 208 |
| 1991 | 9.18 | 208 |
| 1990 | 8.85 | 208 |
| 1989 | 8.54 | 207 |
| 1988 | 8.24 | 207 |
| 1987 | 7.94 | 207 |
| 1986 | 7.66 | 207 |