Year	sq. km
1990	2.2
1991	2.35
1992	2.5
1993	2.65
1994	2.8
1995	2.95
1996	3.1
1997	3.25
1998	3.4
1999	3.55
2000	3.7
2001	3.85
2002	4
2003	4.15
2004	4.3
2005	4.45
2006	4.6
2007	4.75
2008	4.9
2009	5.05
2010	5.2
2011	5.36
2012	5.52
2013	5.68
2014	5.84
2015	6
2016	6.2
2017	6.4
2018	6.6
2019	6.8
2020	7
2021	7.2