Year	cubic meters
1961	2257.1306636996674
1962	2201.0201869913753
1963	2145.206012274334
1964	2090.1811237465754
1965	2036.1495139147614
1966	1982.6799954698934
1967	1929.7905241463006
1968	1878.3905830927656
1969	1828.4937940942098
1970	1780.1037214258326
1971	1733.5565199205964
1972	1688.5625494765288
1973	1644.4767329097024
1974	1601.030499262182
1975	1556.0893368953275
1976	1507.1912520168073
1977	1460.8353192735578
1978	1422.3294759281762
1979	1383.8755553833391
1980	1342.5047915574376
1981	1297.7450444762037
1982	1254.7888434508282
1983	1216.5419647491417
1984	1178.9795830408902
1985	1143.4845892623198
1986	1109.5587243562395
1987	1077.4765158435782
1988	1047.8239876770053
1989	1019.5644273093471
1990	991.130921877337
1991	964.3234669142371
1992	940.9427684458174
1993	920.9839091263109
1994	902.3177438322831
1995	883.593354145341
1996	866.0031342969488
1997	848.96122520929
1998	832.2996800016198
1999	816.1492553966498
2000	800.2649128269974
2001	784.7108799355955
2002	770.744716623394
2003	757.2236756420383
2004	742.812026094196
2005	728.5660116509712
2006	714.7890391333839
2007	701.390806038454
2008	688.2616672077368
2009	675.2717587731888
2010	662.2621708367615
2011	650.084812626878
2012	638.3244653879307
2013	625.9326854515082
2014	613.3836696249257
2015	601.4327326191267
2016	590.6577692540167
2017	580.7942142878502
2018	570.9812782380449
2019	561.3343490854827
2020	552.4624394839738