Year	sq. km
1990	6241141.499999999
1991	6210369.913999999
1992	6179598.328000002
1993	6148826.7420000015
1994	6118055.156
1995	6087283.569999999
1996	6056511.984
1997	6025740.398000001
1998	5994968.812000001
1999	5964197.226
2000	5933425.639999998
2001	5905754.396
2002	5878083.152000001
2003	5850411.908
2004	5822740.664000002
2005	5795069.42
2006	5767398.175999999
2007	5739726.932000001
2008	5712055.687999999
2009	5684384.444
2010	5656713.199999999
2011	5624793.96
2012	5521304.720000002
2013	5489385.48
2014	5457466.24
2015	5425547
2016	5391094.300000001
2017	5357638.9
2018	5324413.28
2019	5290657.1
2020	5257492.199999999
2021	5223933.112