Year	sq. km
1990	6332574.699999999
1991	6304248.851999998
1992	6275923.004000001
1993	6247597.156000001
1994	6219271.308
1995	6190945.459999999
1996	6162619.613000001
1997	6134293.765
1998	6105967.916999999
1999	6077642.069
2000	6049316.220999999
2001	6018543.560999999
2002	5987770.901000001
2003	5956998.240999999
2004	5926225.581
2005	5895452.920999999
2006	5864680.261
2007	5833907.601000001
2008	5803134.940999999
2009	5772362.280000001
2010	5741589.619999999
2011	5702334.236
2012	5663078.852000001
2013	5623823.468000001
2014	5584568.084000001
2015	5545312.699999999
2016	5505964.899999999
2017	5467438.6
2018	5429317.18
2019	5390473.4
2020	5352026.5
2021	5313315.012000001