Year	sq. km
1990	307273.1
1991	305528.95
1992	303784.8
1993	302040.65
1994	300296.5
1995	298552.35
1996	296808.2
1997	295064.05
1998	293319.9
1999	291575.75
2000	289831.6
2001	288086.61
2002	286341.62
2003	284596.63
2004	282851.64
2005	281106.65
2006	279361.66
2007	277616.67
2008	275871.68
2009	274126.69
2010	272381.7
2011	270639.22
2012	197326.74
2013	195584.26
2014	193841.78
2015	192099.3
2016	190481.9
2017	188760.3
2018	187038.7
2019	185317.1
2020	183595.5
2021	181873.9