| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 73.36 | 62 |
| 2015 | 73.48 | 62 |
| 2014 | 73.39 | 63 |
| 2013 | 72.65 | 66 |
| 2012 | 72.95 | 64 |
| 2011 | 73.4 | 61 |
| 2010 | 73.12 | 58 |
| 2009 | 73.52 | 53 |
| 2008 | 74.84 | 50 |
| 2007 | 74.39 | 55 |
| 2006 | 74.11 | 57 |
| 2005 | 73.4 | 58 |
| 2004 | 71.53 | 71 |
| 2003 | 70.92 | 73 |
| 2002 | 71.51 | 70 |
| 2001 | 73.11 | 62 |
| 2000 | 72.06 | 69 |
| 1999 | 72.21 | 71 |
| 1998 | 75.04 | 55 |
| 1997 | 75.46 | 54 |
| 1996 | 74.04 | 62 |
| 1995 | 74.6 | 63 |
| 1994 | 74.13 | 66 |
| 1993 | 74.74 | 64 |
| 1992 | 75.2 | 64 |
| 1991 | 74.28 | 69 |