| 时间 | 值 （平方公里） | 世界排名 |
|---|---|---|
| 2016 | 30 | 211 |
| 2015 | 30 | 211 |
| 2014 | 30 | 210 |
| 2013 | 30 | 210 |
| 2012 | 30 | 211 |
| 2011 | 30 | 211 |
| 2010 | 30 | 210 |
| 2009 | 30 | 210 |
| 2008 | 29 | 210 |
| 2007 | 29 | 210 |
| 2006 | 29 | 210 |
| 2005 | 28 | 210 |
| 2004 | 28 | 210 |
| 2003 | 27 | 210 |
| 2002 | 27 | 210 |
| 2001 | 26 | 210 |
| 2000 | 20 | 210 |
| 1999 | 20 | 208 |
| 1998 | 20 | 208 |
| 1997 | 20 | 208 |
| 1996 | 20 | 208 |
| 1995 | 20 | 208 |
| 1994 | 20 | 208 |
| 1993 | 20 | 208 |
| 1992 | 20 | 207 |
| 1991 | 20 | 207 |
| 1990 | 20 | 204 |
| 1989 | 20 | 204 |
| 1988 | 20 | 204 |
| 1987 | 20 | 204 |
| 1986 | 20 | 204 |