Year	sq. km
1990	10670140.4
1991	10615139
1992	10560137.6
1993	10505136.200000001
1994	10450134.799999997
1995	10395133.4
1996	10340132.000000004
1997	10285130.600000001
1998	10230129.2
1999	10175127.800000003
2000	10120126.399999997
2001	10064257.699999997
2002	10008389.000000004
2003	9952520.3
2004	9896651.6
2005	9840782.900000002
2006	9784914.200000001
2007	9729045.5
2008	9673176.799999997
2009	9617308.1
2010	9561439.399999999
2011	9532008.000000002
2012	9502576.600000003
2013	9473145.199999997
2014	9443713.799999999
2015	9414282.4
2016	9383996.799999999
2017	9349370.8
2018	9326176.899999999
2019	9301136.5
2020	9277297.5
2021	9252657.566