Year	hectares
1961	20000
1962	20000
1963	20000
1964	20000
1965	20000
1966	20000
1967	20000
1968	22000
1969	22000
1970	22000
1971	22000
1972	23000
1973	23000
1974	23000
1975	23000
1976	23000
1977	23000
1978	23000
1979	23000
1980	23000
1981	23000
1982	23000
1983	27000
1984	27000
1985	29000
1986	32000
1987	33000
1988	33000
1989	35000
1990	35000
1991	35000
1992	35000
1993	29000
1994	29000
1995	28000
1996	28000
1997	29000
1998	31000
1999	31000
2000	31000
2001	31000
2002	31000
2003	31000
2004	29000
2005	28000
2006	26000
2007	28000
2008	30000
2009	37000
2010	34300
2011	36900
2012	33700
2013	37700
2014	37500
2015	52160
2016	56110
2017	69300
2018	76660
2019	77840
2020	74660
2021	82610