year	Area
1979	0.1
1980	1.4
1981	0.6
1982	4.8
1983	7.9
1984	10.1
1985	14.2
1986	11.3
1987	19.3
1988	10
1989	18.7
1990	19.2
1991	18.8
1992	22.3
1993	24.2
1994	23.6
1995	
1996	22.7
1997	22.1
1998	25.9
1999	23.2
2000	24.8
2001	25
2002	12
2003	25.8
2004	19.5
2005	24.4
2006	26.6
2007	22
2008	25.2
2009	22
2010	19.4
2011	24.7
2012	17.8
2013	21
2014	20.9
2015	25.6