Year	sq. km
1990	75897.5
1991	76677
1992	77456.5
1993	78236
1994	79015.5
1995	79795
1996	80574.5
1997	81354
1998	82133.5
1999	82913
2000	83692.5
2001	84351.29
2002	85010.08
2003	85668.87
2004	86327.66
2005	86986.45
2006	87645.24
2007	88304.03
2008	88962.82
2009	89621.61
2010	90280.4
2011	90818.48
2012	91356.56
2013	91894.64
2014	92432.72
2015	92970.8
2016	93508.9
2017	94047
2018	94585.1
2019	95123.2
2020	95661.3
2021	96199.4