Year	hectares
1961	2838000
1962	2850000
1963	2850000
1964	2900000
1965	2900000
1966	2900000
1967	2902000
1968	2850000
1969	2750000
1970	2693000
1971	1800000
1972	1800000
1973	1800000
1974	1850000
1975	1850000
1976	1900000
1977	1900000
1978	1950000
1979	1950000
1980	2000000
1981	2000000
1982	2030000
1983	2040000
1984	2040000
1985	2300000
1986	2600000
1987	3000000
1988	3450000
1989	3685000
1990	3695000
1991	3700000
1992	3700000
1993	3716000
1994	3700000
1995	3700000
1996	3700000
1997	3700000
1998	3700000
1999	3700000
2000	3700000
2001	3700000
2002	3700000
2003	3700000
2004	3700000
2005	3700000
2006	3700000
2007	3700000
2008	3700000
2009	3700000
2010	3748000
2011	3795693.8
2012	3852372.2
2013	3882124.2
2014	3911876.1
2015	3941628
2016	3971380
2017	4001131.9
2018	4030883.8
2019	4060635.8
2020	4090387.7
2021	4120139.7