Year	hectares
1961	235000
1962	235000
1963	235000
1964	235000
1965	235000
1966	235000
1967	245000
1968	245000
1969	245000
1970	245000
1971	245000
1972	245000
1973	250000
1974	255000
1975	255000
1976	255000
1977	255000
1978	255000
1979	255000
1980	255000
1981	257000
1982	270000
1983	280000
1984	285000
1985	290000
1986	250000
1987	240000
1988	230000
1989	240000
1990	250000
1991	250000
1992	250000
1993	270000
1994	280000
1995	280000
1996	270000
1997	270000
1998	260000
1999	280000
2000	300000
2001	300000
2002	280000
2003	270000
2004	280000
2005	280000
2006	280000
2007	280000
2008	280000
2009	280000
2010	300000
2011	300000
2012	300000
2013	300000
2014	300000
2015	300000
2016	300000
2017	300000
2018	300000
2019	300000
2020	300000
2021	300000