Year	cubic meters
1961	12605.155850689935
1962	12454.422248881248
1963	12309.912072272522
1964	12169.537823690818
1965	12035.301778815106
1966	11910.32739284293
1967	11794.29776074441
1968	11683.437456708676
1969	11574.15954752691
1970	11466.803176509971
1971	11335.042601453417
1972	11228.259130400565
1973	11130.100461674154
1974	11036.951375832436
1975	10949.388867928674
1976	10872.041921822582
1977	10796.899858262112
1978	10721.890303452787
1979	10646.488084818619
1980	10573.451668866113
1981	10501.846526581952
1982	10436.421752903989
1983	10377.781760707212
1984	10323.741410065235
1985	10269.821859458665
1986	10213.923353361783
1987	10156.537131942963
1988	10096.789375540646
1989	10032.759825085972
1990	9964.080138074933
1991	9884.029817212526
1992	9226.822387420732
1993	9084.436870222535
1994	9033.640057832044
1995	8986.342339964931
1996	8939.373352260593
1997	8893.007609266258
1998	8849.803008432731
1999	8807.991788361225
2000	8764.390810912952
2001	8722.825291530287
2002	8679.390466780696
2003	8636.225983439783
2004	8592.457552992806
2005	8549.581645713175
2006	8503.907406918755
2007	8454.752636943615
2008	8404.173405451707
2009	8361.261975285992
2010	8322.918926135708
2011	8300.53671484773
2012	8266.470320571074
2013	8230.469904650303
2014	8193.38153005711
2015	8157.068496703976
2016	8120.3731584264515
2017	8089.769779155475
2018	8061.400824308156
2019	8038.469092968466
2020	8008.514179365293