Year	sq. km
1990	392184.8
1991	387834.43
1992	383484.06
1993	379133.69
1994	374783.32
1995	370432.95
1996	366082.58
1997	361732.21
1998	357381.84
1999	353031.47
2000	348681.1
2001	345253.99
2002	341826.88
2003	338399.77
2004	334972.66
2005	331545.55
2006	328118.44
2007	324691.33
2008	321264.22
2009	317837.11
2010	314410
2011	311512.88
2012	308615.76
2013	305718.64
2014	302821.52
2015	299924.4
2016	297027.3
2017	294130.2
2018	291233.1
2019	288336
2020	285438.9
2021	282541.8