Year	sq. km
1990	7339644.5
1991	7306915.748000001
1992	7274186.996
1993	7241458.244
1994	7208729.492000001
1995	7176000.74
1996	7143271.988
1997	7110543.236000001
1998	7077814.484000002
1999	7045085.732000001
2000	7012356.9799999995
2001	6977792.902
2002	6943228.824
2003	6908664.746
2004	6874100.668
2005	6839536.590000001
2006	6804972.512
2007	6770408.434000001
2008	6735844.3560000025
2009	6701280.277999999
2010	6666716.200000001
2011	6627570.260000001
2012	6588424.32
2013	6549278.379999999
2014	6510132.44
2015	6470986.500000001
2016	6430836.878999999
2017	6391509.3
2018	6352213.379999999
2019	6311896.299999999
2020	6271975.699999999
2021	6231790.778999999