| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 48.78 | 123 |
| 2015 | 49.16 | 124 |
| 2014 | 49.57 | 123 |
| 2013 | 50.2 | 124 |
| 2012 | 51.06 | 124 |
| 2011 | 52.02 | 125 |
| 2010 | 52.95 | 125 |
| 2009 | 54.34 | 125 |
| 2008 | 56.07 | 125 |
| 2007 | 58.04 | 125 |
| 2006 | 60.1 | 126 |
| 2005 | 62.25 | 126 |
| 2004 | 64.26 | 128 |
| 2003 | 66.23 | 129 |
| 2002 | 68.47 | 130 |
| 2001 | 71.39 | 132 |
| 2000 | 75.17 | 141 |
| 1999 | 79.67 | 148 |
| 1998 | 84.4 | 160 |
| 1997 | 88.63 | 169 |
| 1996 | 91.32 | 179 |
| 1995 | 92.05 | 178 |
| 1994 | 92.28 | 175 |
| 1993 | 90.58 | 171 |
| 1992 | 87.67 | 157 |
| 1991 | 85.11 | 146 |
| 1990 | 83.85 | 142 |
| 1989 | 81.79 | 130 |
| 1988 | 81.19 | 129 |
| 1987 | 81.39 | 129 |
| 1986 | 80.58 | 128 |