Year	cubic meters
1961	945.1217626142824
1962	931.7541737716452
1963	919.2738806043742
1964	907.05789997955
1965	894.6921331835456
1966	883.0907469671253
1967	873.1405380815879
1968	864.1194885575262
1969	854.1709634054523
1970	843.6536461253365
1971	833.6808898436977
1972	825.2934124404578
1973	818.4936710348929
1974	812.1044313142743
1975	804.8975822705942
1976	798.6039241799626
1977	793.8693081825913
1978	788.9999067545565
1979	783.5723347677456
1980	777.3961469420062
1981	772.0810982755359
1982	768.5487493965146
1983	765.6397581413607
1984	762.6067034099821
1985	759.0587450743989
1986	754.8579570057613
1987	750.0833444879819
1988	745.2527063852032
1989	740.7952652676726
1990	735.7116438406555
1991	729.9367914553334
1992	724.4388661188241
1993	719.407145727297
1994	715.082613494337
1995	711.559333116243
1996	708.2837910284654
1997	704.6471479406688
1998	700.3153774804932
1999	695.670299836429
2000	690.715583227994
2001	685.5214138193638
2002	681.1597227283618
2003	677.9534827764685
2004	675.6018491591121
2005	674.0250595164127
2006	672.9433520568606
2007	671.4811457861261
2008	668.8722018111478
2009	665.4411257618393
2010	662.0366631089217
2011	658.955923875974
2012	656.5219306376225
2013	654.5892178920418
2014	652.2380540821564
2015	649.3536009579265
2016	645.907057262714
2017	642.0996987034723
2018	638.3611898681169
2019	634.193133948393
2020	630.6797007138148