Year	sq. km
1990	7339307.5
1991	7306578.748
1992	7273849.9959999975
1993	7241121.244
1994	7208392.492
1995	7175663.739999999
1996	7142934.987999999
1997	7110206.236
1998	7077477.483999999
1999	7044748.732000002
2000	7012019.979999998
2001	6977455.902
2002	6942891.823999999
2003	6908327.745999998
2004	6873763.667999999
2005	6839199.590000001
2006	6804635.511999997
2007	6770071.434
2008	6735507.355999999
2009	6700943.278000001
2010	6666379.2
2011	6627233.26
2012	6588087.32
2013	6548941.380000001
2014	6509795.4399999995
2015	6470649.500000001
2016	6430499.879000001
2017	6391172.299999998
2018	6351876.380000004
2019	6311559.299999999
2020	6271638.699999999
2021	6231453.779