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	986.1113848877097
1991	959.2944875943041
1992	935.8674854969424
1993	915.8222402618746
1994	897.058049257299
1995	878.2437587525246
1996	860.5530305146717
1997	843.4084826656157
1998	826.8078398638364
1999	810.7147033821451
2000	794.8880149712339
2001	779.390813664869
2002	765.4589176844127
2003	751.9687539168857
2004	737.6078205752666
2005	723.414112235737
2006	709.6855906156965
2007	696.3333961901651
2008	683.2351648279251
2009	670.2843252379297
2010	657.3237339779379
2011	645.1893972591064
2012	633.4723110973009
2013	621.1440924901026
2014	608.669268504732
2015	596.7884594438318
2016	586.0676286848488
2017	576.2607839439775
2018	566.4708004619885
2019	556.8482762631913
2020	547.9904131740093