Year	sq. km
1990	99242.6
1991	98166.95
1992	97091.3
1993	96015.65
1994	94940
1995	93864.35
1996	92788.7
1997	91713.05
1998	90637.4
1999	89561.75
2000	88486.1
2001	87580.42
2002	86674.74
2003	85769.06
2004	84863.38
2005	83957.7
2006	83052.02
2007	82146.34
2008	81240.66
2009	80334.98
2010	79429.3
2011	79304.32
2012	79179.34
2013	79054.36
2014	78929.38
2015	78804.4
2016	79222.4
2017	79640.4
2018	79712.6
2019	79784.8
2020	79857.1
2021	79929.333