Year	sq. km
1990	6173424.799999999
1991	6145305.623999998
1992	6117186.448000001
1993	6100473.072
1994	6072322.296000001
1995	6044171.5200000005
1996	6016020.744000001
1997	5987869.968000001
1998	5959719.192
1999	5931568.415999999
2000	5903417.639999999
2001	5873261.276
2002	5843104.912
2003	5812948.548
2004	5782792.184
2005	5752635.82
2006	5722479.456
2007	5692323.092
2008	5662166.727999999
2009	5632010.364
2010	5601853.999999999
2011	5566366.879999999
2012	5530879.760000002
2013	5495392.64
2014	5459905.52
2015	5424418.399999999
2016	5387374.478999999
2017	5351162
2018	5315324.179999999
2019	5278468.2
2020	5242008.6
2021	5205284.746