Year	hectares
1961	1000
1962	1000
1963	1000
1964	1000
1965	1000
1966	1000
1967	1000
1968	1000
1969	1000
1970	1000
1971	1000
1972	1000
1973	1000
1974	1000
1975	1000
1976	1000
1977	1000
1978	1000
1979	1000
1980	1000
1981	1000
1982	1000
1983	1000
1984	1000
1985	1000
1986	1000
1987	1000
1988	1000
1989	1000
1990	1000
1991	1000
1992	1000
1993	1000
1994	1000
1995	1000
1996	1000
1997	1000
1998	1000
1999	1000
2000	1000
2001	750
2002	850
2003	860
2004	810
2005	800
2006	780
2007	770
2008	760
2009	770
2010	770
2011	770
2012	760
2013	810
2014	800
2015	810
2016	820
2017	820
2018	824.5
2019	791.1
2020	768.9
2021	747.6