Year	sq. km
1992	32285507.134
1993	32201473.078
1994	32117439.022000004
1995	32033404.96800001
1996	31949370.913999993
1997	31865336.858
1998	31781302.801999994
1999	31697268.747000005
2000	31613234.691999998
2001	31554171.61500001
2002	31495108.535999984
2003	31436045.458999995
2004	31376982.380999994
2005	31317919.303999994
2006	31292440.225999992
2007	31233831.147999976
2008	31175222.070999987
2009	31116612.990999985
2010	31058003.914
2011	31001079.65499999
2012	30944155.393999998
2013	30887231.13399999
2014	30830306.876000006
2015	30773382.616
2016	30730056.403
2017	30663489.75899999
2018	30614171.742
2019	30562216
2020	30511789.400000006
2021	30460343.37