Year	hectares
1966	12
1967	8
1968	12
1969	20
1970	25
1971	35
1972	40
1973	14
1974	18
1975	32
1976	28
1977	18
1978	20
1979	50
1980	17
1981	25
1982	33
1983	38
1984	17
1985	20
1986	21
1987	25
1988	28
1989	28
1990	21
1991	30
1992	30
1993	30
1994	30
1995	28
1996	30
1997	30
1998	30
1999	30
2000	30
2001	31
2002	32
2003	35
2004	38
2005	38
2006	40
2007	40
2008	42
2009	42
2010	40
2011	45
2012	44
2013	45
2014	46
2015	47
2016	35
2017	25
2018	17
2019	10
2020	3
2021	5
2022	5