| 序号 | 时间 (年) |
数据 (平方公里) |
|---|---|---|
| 1 | 2019 | |
| 2 | 2018 | |
| 3 | 2016 | |
| 4 | 2015 | |
| 5 | 2014 | |
| 6 | 2013 | |
| 7 | 2012 | 824.00 |
| 8 | 2011 | 790.00 |
| 9 | 2010 | 720.00 |
| 10 | 2009 | 692.00 |
| 11 | 2008 | 640.00 |
| 12 | 2007 | 617.00 |
| 13 | 2006 | 578.00 |
| 14 | 2005 | 574.00 |
| 15 | 2004 | 554.00 |
| 16 | 2003 | 541.00 |
| 17 | 2002 | 519.00 |
| 18 | 2001 | 489.00 |
| 19 | 2000 | 470.00 |
| 20 | 1999 | 378.00 |
| 21 | 1998 | 367.00 |
| 22 | 1997 | 352.00 |
| 23 | 1996 | 557.00 |
| 24 | 1995 | 514.00 |
| 25 | 1994 | 505.00 |
| 26 | 1993 | 461.00 |
| 27 | 1991 | 388.00 |
| 28 | 1990 | 398.00 |
| 29 | 1989 | 390.00 |
| 30 | 1988 | 376.00 |
| 31 | 1987 | 357.00 |
| 32 | 1986 | 353.00 |
| 33 | 1985 | 343.00 |
| 34 | 1984 | 291.00 |
