Year	sq. km
1990	825834.3
1991	829035.8979999999
1992	832237.4959999999
1993	835439.0939999998
1994	838640.692
1995	841842.29
1996	845043.889
1997	848245.487
1998	851447.085
1999	854648.683
2000	857850.2809999998
2001	859523.5249999999
2002	861196.769
2003	862870.013
2004	864543.257
2005	866216.5009999998
2006	867889.745
2007	869562.989
2008	871236.233
2009	872909.4759999999
2010	874582.72
2011	876984.756
2012	879386.792
2013	881788.8280000001
2014	884190.8640000001
2015	886592.8999999999
2016	888601.5
2017	891070.5
2018	893309.3
2019	895548.1000000001
2020	897786.8999999999
2021	900025.7