Year	hectares
1961	180630000
1962	177095000
1963	179574000
1964	177966000
1965	177000000
1966	175705000
1967	174487000
1968	181000000
1969	189244000
1970	188735000
1971	188140000
1972	187545000
1973	187050000
1974	186472000
1975	186472000
1976	186472000
1977	186552000
1978	188755000
1979	188755000
1980	188755000
1981	188755000
1982	187765000
1983	187765000
1984	187765000
1985	187765000
1986	187765000
1987	185742000
1988	185742000
1989	185726000
1990	185676000
1991	185676000
1992	184080000
1993	182748000
1994	181939000
1995	181839000
1996	179006000
1997	177592000
1998	176782000
1999	175368000
2000	175368000
2001	175400000
2002	172977000
2003	170731300
2004	168515900
2005	166270600
2006	164025300
2007	161780000
2008	160425500
2009	159071000
2010	157716500
2011	156362000
2012	155007500
2013	155553400
2014	156099300
2015	156645100
2016	157191000
2017	157736800
2018	157736800
2019	157736800
2020	157736800
2021	157736800