Year	sq. km
1990	78508.6
1991	75752.19
1992	72995.78
1993	70239.37
1994	67482.96
1995	64726.55
1996	61970.14
1997	59213.73
1998	56457.32
1999	53700.91
2000	50944.5
2001	49815.63
2002	48686.76
2003	47557.89
2004	46429.02
2005	45300.15
2006	44171.28
2007	43042.41
2008	41913.54
2009	40784.67
2010	39655.8
2011	38526.94
2012	37398.08
2013	36269.22
2014	35140.36
2015	34011.5
2016	32882.6
2017	31753.7
2018	30624.8
2019	29496
2020	28367.1
2021	27238.267000000003