| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 74.94 | 153 |
| 2015 | 75.76 | 154 |
| 2014 | 76.75 | 154 |
| 2013 | 77.94 | 155 |
| 2012 | 79.32 | 155 |
| 2011 | 80.78 | 157 |
| 2010 | 82.24 | 159 |
| 2009 | 84.09 | 162 |
| 2008 | 86.09 | 164 |
| 2007 | 88.21 | 169 |
| 2006 | 90.37 | 174 |
| 2005 | 92.54 | 175 |
| 2004 | 94.48 | 176 |
| 2003 | 96.25 | 180 |
| 2002 | 97.76 | 181 |
| 2001 | 99.1 | 183 |
| 2000 | 100.4 | 187 |
| 1999 | 101.51 | 187 |
| 1998 | 102.28 | 189 |
| 1997 | 102.8 | 190 |
| 1996 | 103.05 | 190 |
| 1995 | 102.91 | 189 |
| 1994 | 103 | 188 |
| 1993 | 103.02 | 186 |
| 1992 | 102.99 | 185 |
| 1991 | 102.92 | 185 |
| 1990 | 102.8 | 187 |