Year	hectares
1961	399000
1962	399000
1963	399000
1964	399000
1965	400000
1966	400000
1967	400000
1968	400000
1969	400000
1970	400000
1971	400000
1972	401000
1973	401000
1974	401000
1975	401000
1976	401000
1977	401000
1978	401000
1979	403000
1980	403000
1981	403000
1982	405000
1983	405000
1984	405000
1985	407000
1986	407000
1987	409000
1988	409000
1989	414000
1990	420000
1991	300000
1992	250000
1993	350000
1994	395000
1995	345000
1996	345000
1997	300000
1998	230000
1999	240000
2000	350000
2001	200000
2002	245000
2003	195000
2004	226000
2005	213500
2006	201000
2007	182000
2008	279000
2009	316000
2010	259000
2011	324000
2012	285000
2013	280000
2014	402000
2015	259600
2016	259600
2017	259600
2018	259600
2019	260000
2020	260000
2021	260000