Year	sq. km
1990	792627.8
1991	791073.63
1992	789519.46
1993	787965.29
1994	786411.12
1995	784856.95
1996	783302.78
1997	781748.61
1998	780194.44
1999	778640.27
2000	777086.1
2001	771535.49
2002	765984.88
2003	760434.27
2004	754883.66
2005	749333.05
2006	743782.44
2007	738231.83
2008	732681.22
2009	727130.61
2010	721580
2011	716029.38
2012	710478.76
2013	704928.14
2014	699377.52
2015	693826.9
2016	688276.2
2017	682725.7
2018	677175.1
2019	671624.4
2020	666073.8
2021	660523.1329999999