Year	hectares
1961	5000
1962	5000
1963	5000
1964	5000
1965	5000
1966	5000
1967	5000
1968	5000
1969	5000
1970	5000
1971	5000
1972	5000
1973	5000
1974	5300
1975	5000
1976	5000
1977	5000
1978	5000
1979	4700
1980	4500
1981	4300
1982	4000
1983	3700
1984	3500
1985	3300
1986	3300
1987	3000
1988	3000
1989	3000
1990	2900
1991	2800
1992	2700
1993	2700
1994	2500
1995	2000
1996	1900
1997	1900
1998	2000
1999	2000
2000	2000
2001	2000
2002	2000
2003	2000
2004	2000
2005	2200
2006	2300
2007	2670
2008	2670
2009	2670
2010	2670
2011	2670
2012	2670
2013	2670
2014	2670
2015	2670
2016	2670
2017	2670
2018	2670
2019	2670
2020	2670
2021	2670