Year	hectares
1961	18584301
1962	19335702
1963	20300188
1964	19962877
1965	19846778
1966	18323303
1967	20784080
1968	20149935
1969	20271727
1970	21401250
1971	19903648
1972	21784102
1973	21422455
1974	22051547
1975	22776328
1976	24418324
1977	22227956
1978	23263857
1979	22086289
1980	22988703
1981	23489576
1982	22694791
1983	23674984
1984	21963384
1985	27775078
1986	26029916
1987	23937943
1988	26634547
1989	26154005
1990	25882519
1991	29641987
1992	31259073
1993	28276457
1994	31381967
1995	27186509
1996	31819685
1997	28365488
1998	31519162
1999	26670369
2000	24858429
2001	27699700
2002	26229201
2003	31227607
2004	27095792
2005	34533436
2006	30354055
2007	29792728
2008	27075764
2009	29169791
2010	27790566
2011	29559972
2012	25752885
2013	30527463
2014	31966058
2015	25486477
2016	29325582
2017	28138629
2018	28832670
2019	29337232
2020	29548555
2021	27597465
2022	26188249