Year	sq. km
1990	204085.6
1991	203324
1992	202562.4
1993	190395
1994	189665
1995	188935
1996	188205
1997	187475
1998	186745
1999	186015
2000	185285
2001	184555
2002	183825
2003	183095
2004	182365
2005	181635
2006	180905
2007	180175
2008	179445
2009	178715
2010	177985
2011	177255
2012	176525
2013	175795
2014	175065
2015	174335
2016	173605
2017	172875
2018	172145
2019	171415
2020	170685
2021	169955