Year	hectares
1961	1638000
1962	1643000
1963	1648000
1964	1653000
1965	1658000
1966	1662000
1967	1668000
1968	1668000
1969	1668000
1970	1718000
1971	1718000
1972	1718000
1973	1718000
1974	1768000
1975	1818000
1976	2017000
1977	2015000
1978	2015000
1979	2010000
1980	2010000
1981	2013000
1982	2013000
1983	2013000
1984	2013000
1985	2033000
1986	2036000
1987	2036000
1988	2053000
1989	2053000
1990	2053000
1991	2063000
1992	2163000
1993	3060000
1994	3160000
1995	3305000
1996	4530000
1997	4530000
1998	4530000
1999	4530000
2000	4530000
2001	4530000
2002	4900000
2003	5942000
2004	4902000
2005	5603000
2006	5677000
2007	5808000
2008	6031000
2009	6255400
2010	6261000
2011	6450000
2012	6639000
2013	6828000
2014	7017000
2015	7206000
2016	7396000
2017	7585000
2018	7774000
2019	7963000
2020	8152000
2021	8341000