Year	sq. km
1992	11453.18
1993	11497.658000000001
1994	11542.135
1995	11586.613000000001
1996	11631.09
1997	11675.567
1998	11720.045
1999	11764.523000000001
2000	11809
2001	11857.78
2002	11906.56
2003	11955.34
2004	12004.12
2005	12052.9
2006	12101.68
2007	12150.46
2008	12199.24
2009	12248.02
2010	12296.8
2011	12341.06
2012	12385.32
2013	12429.58
2014	12473.84
2015	12518.1
2016	12562.4
2017	12606.642
2018	12789
2019	12971.4
2020	13153.8
2021	13336.2