Year	sq. km
1990	93031.6
1991	92581.6
1992	92131.6
1993	91681.6
1994	91231.6
1995	90781.6
1996	90331.6
1997	89881.6
1998	89431.6
1999	88981.6
2000	88531.6
2001	88146.6
2002	87761.6
2003	87376.6
2004	86991.6
2005	86606.6
2006	86221.6
2007	85836.6
2008	85451.6
2009	85066.6
2010	84681.6
2011	84281.6
2012	83881.6
2013	83481.6
2014	83081.6
2015	82681.6
2016	82281.6
2017	81881.6
2018	81481.6
2019	81081.6
2020	80681.6
2021	80281.6