Year	cubic meters
1961	315792.10866329435
1962	311932.95723855647
1963	307928.0199477273
1964	303799.34423800086
1965	299524.23132767767
1966	295097.77812965587
1967	290555.5279960881
1968	285908.04569647374
1969	280520.26245749433
1970	274618.5481386221
1971	268987.83486115147
1972	263543.14474464435
1973	258150.63404314267
1974	252726.83003504275
1975	247233.69614375735
1976	241652.6684937966
1977	235994.6527065277
1978	230293.413467952
1979	224599.69213408054
1980	218935.81175792107
1981	213290.6058493648
1982	207704.0470626975
1983	202195.049180247
1984	196780.24326357633
1985	191480.96515746973
1986	186291.6600404389
1987	181212.2658604931
1988	176256.14747050934
1989	171456.82894776735
1990	166831.46360022298
1991	162377.04147050233
1992	158080.51696184668
1993	153934.24004355213
1994	149961.91515996092
1995	146172.24795091467
1996	142534.20603667127
1997	139005.9043605474
1998	135556.01108253046
1999	132176.62665905844
2000	128836.11496266503
2001	125517.56863285346
2002	122233.3524136615
2003	118978.69846009642
2004	115728.48967264363
2005	112455.62631269658
2006	109148.9443832885
2007	105821.8811258932
2008	102501.40939437917
2009	99181.03078119576
2010	95844.49814593494
2011	92524.682651622
2012	89290.33241592962
2013	86214.78205008237
2014	83381.84563681614
2015	80847.23963368313
2016	78611.60403143315
2017	76627.81542975824
2018	74817.10866546351
2019	73123.37116576043
2020	71535.34478509518