Year	sq. km
1990	1374477.7
1991	1370942.266
1992	1393724.717
1993	1390601.373
1994	1387478.0300000003
1995	1384354.6870000002
1996	1381231.345
1997	1378108.0019999999
1998	1374984.658
1999	1371861.3150000002
2000	1368737.9729999998
2001	1365409.4109999998
2002	1362080.849
2003	1358752.2869999998
2004	1355423.7249999999
2005	1352095.163
2006	1348766.601
2007	1345438.0389999999
2008	1342109.477
2009	1338780.9149999998
2010	1335452.3530000001
2011	1332314.904
2012	1329177.455
2013	1326040.0059999998
2014	1322902.5579999997
2015	1319765.109
2016	1316722.7789999999
2017	1314043.3599999999
2018	1311097.7999999998
2019	1307859.6
2020	1304621.4
2021	1301383.2