Year	hectares
1961	902089
1962	897794
1963	888269
1964	896099
1965	866741
1966	900828
1967	902756
1968	911199
1969	957929
1970	961847
1971	969719
1972	975268
1973	982257
1974	986019
1975	987058
1976	1024869
1977	1026231
1978	1053361
1979	1067918
1980	1068780
1981	1050430
1982	1051744
1983	1067296
1984	1051447
1985	1053466
1986	1058754
1987	1000352
1988	966344
1989	946951
1990	948437
1991	924565
1992	838900
1993	826603
1994	822728
1995	809135
1996	833764
1997	849121
1998	840960
1999	811405
2000	831695
2001	825984
2002	816775
2003	812408
2004	819595
2005	800099
2006	780782
2007	815523
2008	845637
2009	839771
2010	824426
2011	809471
2012	813509
2013	786663
2014	811771
2015	783127
2016	786833
2017	778650
2018	778940
2019	776400
2020	764890
2021	747450
2022	754950