| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 72.92 | 102 |
| 2015 | 73.08 | 100 |
| 2014 | 73.36 | 98 |
| 2013 | 73.71 | 95 |
| 2012 | 73.77 | 95 |
| 2011 | 74.37 | 93 |
| 2010 | 74.18 | 96 |
| 2009 | 74.42 | 93 |
| 2008 | 74.99 | 88 |
| 2007 | 75.43 | 86 |
| 2006 | 75.35 | 87 |
| 2005 | 74.77 | 92 |
| 2004 | 74.23 | 95 |
| 2003 | 73.58 | 100 |
| 2002 | 74.4 | 94 |
| 2001 | 73.67 | 105 |
| 2000 | 73.34 | 112 |
| 1999 | 73.14 | 115 |
| 1998 | 73.24 | 113 |
| 1997 | 73.98 | 111 |
| 1996 | 74.22 | 107 |
| 1995 | 73.91 | 112 |
| 1994 | 73.49 | 117 |
| 1993 | 73.06 | 124 |
| 1992 | 73.1 | 125 |
| 1991 | 73.75 | 125 |
| 1990 | 74.35 | 121 |