Year	sq. km
1990	8401025.7
1991	8362184.368000002
1992	8394379.121
1993	8343910.279
1994	8304878.838
1995	8265847.397
1996	8226815.958000001
1997	8187784.517
1998	8148753.075
1999	8109721.634
2000	8070690.194
2001	8049101.832
2002	8027513.470000002
2003	8005925.108000001
2004	7984336.746000001
2005	7962748.3840000015
2006	7941160.021999999
2007	7919571.660000001
2008	7897983.298000001
2009	7876394.935000002
2010	7854806.573000001
2011	7824279.759999999
2012	7793752.947000001
2013	7763226.134
2014	7732699.322
2015	7702172.509
2016	7686805.000000001
2017	7655531.46
2018	7632988.399999999
2019	7610957.100000001
2020	7589317.5
2021	7567416.765