| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 74.93 | 50 |
| 2015 | 74.92 | 51 |
| 2014 | 74.94 | 50 |
| 2013 | 75.14 | 50 |
| 2012 | 75.04 | 51 |
| 2011 | 69.19 | 84 |
| 2010 | 70.93 | 78 |
| 2009 | 72.61 | 65 |
| 2008 | 72.92 | 68 |
| 2007 | 71.37 | 76 |
| 2006 | 71.29 | 75 |
| 2005 | 72.56 | 62 |
| 2004 | 72.5 | 62 |
| 2003 | 72.26 | 63 |
| 2002 | 73.5 | 56 |
| 2001 | 72.65 | 63 |
| 2000 | 72.05 | 70 |
| 1999 | 73.43 | 61 |
| 1998 | 73.74 | 62 |
| 1997 | 72.35 | 73 |
| 1996 | 71.03 | 84 |
| 1995 | 68.92 | 97 |
| 1994 | 67.99 | 105 |
| 1993 | 67.13 | 111 |
| 1992 | 67.59 | 112 |
| 1991 | 68.14 | 111 |