Year	cubic meters
1961	10242.358136688927
1962	10035.711492844668
1963	9818.955046400939
1964	9594.208586816685
1965	9363.310112526924
1966	9128.387209588363
1967	8888.080881536021
1968	8646.499922097282
1969	8405.184470603004
1970	8164.70435419972
1971	7927.978944523452
1972	7694.133223417144
1973	7467.408881852499
1974	7246.283044991654
1975	7027.374819181995
1976	6830.479907744168
1977	6651.484868411818
1978	6539.118471629674
1979	6434.535909097557
1980	6311.514210128341
1981	6238.644350684732
1982	6126.183467260721
1983	5962.723299631685
1984	5800.403956704127
1985	5634.26143155973
1986	5461.046162684211
1987	5285.602738903237
1988	5099.553044044079
1989	4782.348785392099
1990	4499.59861535079
1991	4351.4594696164295
1992	4214.308535274652
1993	4079.9187195413533
1994	3952.647792773456
1995	3837.1216604271913
1996	3733.1840059730944
1997	3637.991497966623
1998	3548.4831674590273
1999	3464.0272578456565
2000	3386.2136030137303
2001	3318.24680214738
2002	3261.804847698601
2003	3215.996449874049
2004	3176.2302478181464
2005	3138.2698249752275
2006	3100.8407506853564
2007	3062.4034298918414
2008	3021.752695050212
2009	2978.84008029328
2010	2934.3519726609857
2011	2888.8451185083054
2012	2842.0231883255597
2013	2794.271742927
2014	2746.320665929262
2015	2698.5539956122216
2016	2651.341682190215
2017	2605.1644848414107
2018	2560.6065644641017
2019	2517.7344967228582
2020	2474.7920732731295