Year	sq. km
1990	705916.5
1991	703706.2
1992	701495.9
1993	699285.6
1994	697075.3
1995	694865
1996	692654.7
1997	690444.4
1998	688234.1
1999	686023.8
2000	683813.5
2001	682375.46
2002	680937.42
2003	679499.38
2004	678061.34
2005	676623.3
2006	675185.26
2007	673747.22
2008	672309.18
2009	670871.14
2010	669433.1
2011	668208.3
2012	666983.5
2013	665758.7
2014	664533.9
2015	663309.1
2016	662031.5
2017	660753.8
2018	659476.1
2019	658198.5
2020	656920.8
2021	655643.167