Year	hectares
1961	224000
1962	213000
1963	212000
1964	191000
1965	215000
1966	187000
1967	170000
1968	164000
1969	166000
1970	152000
1971	130000
1972	115000
1973	95000
1974	95000
1975	94000
1976	94000
1977	96000
1978	98000
1979	97000
1980	74000
1981	68000
1982	67000
1983	64000
1984	66000
1985	63000
1986	64000
1987	63000
1988	77000
1989	70000
1990	65000
1991	55000
1992	52000
1993	32000
1994	33000
1995	33000
1996	33000
1997	37000
1998	51500
1999	54600
2000	59700
2001	64900
2002	68000
2003	61200
2004	55400
2005	50600
2006	43800
2007	36900
2008	41000
2009	45100
2010	49200
2011	52300
2012	55100
2013	54200
2014	53300
2015	52400
2016	51500
2017	50600
2018	50200
2019	50200
2020	50200
2021	50200