Year	hectares
1961	25000
1962	25000
1963	24700
1964	24200
1965	24400
1966	23200
1967	23100
1968	22800
1969	22600
1970	21800
1971	21200
1972	21000
1973	20800
1974	21100
1975	20900
1976	21200
1977	21400
1978	21600
1979	21900
1980	22200
1981	22000
1982	21800
1983	21500
1984	21300
1985	21100
1986	20900
1987	20700
1988	20500
1989	20300
1990	20100
1991	19900
1992	19700
1993	19500
1994	19300
1995	19100
1996	18900
1997	18700
1998	18500
1999	18300
2000	18100
2001	17900
2002	18500
2003	17570
2004	18100
2005	17810
2006	27960
2007	27520
2008	27280
2009	25620
2010	25380
2011	24970
2012	21500
2013	21900
2014	22100
2015	23200
2016	23500
2017	23000
2018	23100
2019	24100
2020	23500
2021	23200