| 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 | 845.00 |
| 8 | 2011 | 780.00 |
| 9 | 2010 | 783.00 |
| 10 | 2009 | 719.00 |
| 11 | 2008 | 674.00 |
| 12 | 2007 | 605.00 |
| 13 | 2006 | 631.00 |
| 14 | 2005 | 541.00 |
| 15 | 2004 | 511.00 |
| 16 | 2003 | 488.00 |
| 17 | 2002 | 455.00 |
| 18 | 2001 | 436.00 |
| 19 | 2000 | 409.00 |
| 20 | 1999 | 381.00 |
| 21 | 1998 | 335.00 |
| 22 | 1997 | 334.00 |
| 23 | 1996 | 387.00 |
| 24 | 1995 | 383.00 |
| 25 | 1994 | 388.00 |
| 26 | 1993 | 396.00 |
| 27 | 1991 | 352.00 |
| 28 | 1990 | 332.00 |
| 29 | 1989 | 413.00 |
| 30 | 1988 | 389.00 |
| 31 | 1987 | 265.00 |
| 32 | 1986 | 260.00 |
| 33 | 1985 | 229.00 |
| 34 | 1984 | 221.00 |
