Year	hectares
1961	8441623
1962	9154626
1963	9191184
1964	9822032
1965	9846764
1966	11504354
1967	11884253
1968	14121516
1969	12781700
1970	10598124
1971	11689197
1972	11555097
1973	12891607
1974	11744994
1975	12564985
1976	12967979
1977	14599138
1978	15042503
1979	15457828
1980	15587177
1981	16912666
1982	16201605
1983	18873052
1984	17772613
1985	17165159
1986	15771295
1987	13857882
1988	13434992
1989	13347412
1990	13428753
1991	13413725
1992	11921408
1993	13146872
1994	13640768
1995	12361512
1996	14726894
1997	16546006
1998	15923700
1999	16887700
2000	16792290
2001	17716654
2002	17561143
2003	17196654
2004	20026924
2005	20274539
2006	19181586
2007	18110965
2008	20159099
2009	20674118
2010	20141256
2011	19057341
2012	19431383
2013	18381762
2014	17971289
2015	18347387
2016	16976709
2017	18716022
2018	16634020
2019	16527516
2020	16123658
2021	20048257
2022	19548270