Year	hectares
1961	285000
1962	285000
1963	285000
1964	285000
1965	285000
1966	285000
1967	285000
1968	285000
1969	285000
1970	285000
1971	285000
1972	285000
1973	283000
1974	283000
1975	283000
1976	283000
1977	283000
1978	283000
1979	283000
1980	283000
1981	283000
1982	283000
1983	283000
1984	283000
1985	285000
1986	285000
1987	285000
1988	280000
1989	260000
1990	260000
1991	260000
1992	250000
1993	230000
1994	230000
1995	220000
1996	210000
1997	210000
1998	210000
1999	220000
2000	210000
2001	210000
2002	200000
2003	210000
2004	210000
2005	210000
2006	210000
2007	200000
2008	200000
2009	220000
2010	225000
2011	232000
2012	232000
2013	232000
2014	232000
2015	253500
2016	253500
2017	253000
2018	252500
2019	243000
2020	243000
2021	243000