| 时间 | 值 （平方公里） | 世界排名 |
|---|---|---|
| 2016 | 357380 | 64 |
| 2015 | 357380 | 64 |
| 2014 | 357380 | 64 |
| 2013 | 357340 | 64 |
| 2012 | 357170 | 64 |
| 2011 | 357140 | 64 |
| 2010 | 357127 | 63 |
| 2009 | 357120 | 63 |
| 2008 | 357110 | 63 |
| 2007 | 357100 | 63 |
| 2006 | 357100 | 63 |
| 2005 | 357090 | 63 |
| 2004 | 357050 | 63 |
| 2003 | 357040 | 63 |
| 2002 | 357040 | 63 |
| 2001 | 357030 | 63 |
| 2000 | 357030 | 63 |
| 1999 | 357030 | 63 |
| 1998 | 357030 | 63 |
| 1997 | 357030 | 63 |
| 1996 | 357030 | 62 |
| 1995 | 357020 | 62 |
| 1994 | 357000 | 62 |
| 1993 | 356990 | 62 |
| 1992 | 356970 | 62 |
| 1991 | 356970 | 62 |
| 1990 | 356970 | 62 |
| 1989 | 356970 | 62 |
| 1988 | 356970 | 62 |
| 1987 | 356970 | 62 |
| 1986 | 356970 | 62 |