Year	cubic meters
1961	2589.981627317831
1962	2510.5140852915774
1963	2434.680810809577
1964	2364.019621362857
1965	2299.4617822265977
1966	2237.0885038818146
1967	2178.6472597610205
1968	2121.742958797078
1969	2065.5617919264932
1970	2015.2901744947394
1971	1965.4916984591773
1972	1915.4297845341016
1973	1867.8198378810205
1974	1823.0986600224849
1975	1783.3351785898724
1976	1563.3045522451494
1977	1388.239356759294
1978	1507.8194574677113
1979	1653.9382336766632
1980	1619.5960322596536
1981	1585.6121553027826
1982	1563.450182777098
1983	1544.9035883604388
1984	1517.2789624846453
1985	1487.5648872704733
1986	1451.0234249594166
1987	1415.5659167116403
1988	1388.4276866364992
1989	1361.5082334373942
1990	1335.6707571583604
1991	1309.0668698629352
1992	1281.5696665275627
1993	1256.9406692580592
1994	1234.522178190931
1995	1212.2314149771191
1996	1189.8142972547762
1997	1168.5795258537264
1998	1148.6595143467573
1999	1129.4064498520008
2000	1110.946012189855
2001	1093.5933655335825
2002	1079.460431703213
2003	1065.5284455027709
2004	1049.2268837283927
2005	1033.8045471893006
2006	1016.9784553114242
2007	998.0023319987824
2008	982.0744809378319
2009	969.4746760086324
2010	960.8070779454741
2011	951.4265054738738
2012	926.9385132717318
2013	845.2414053476663
2014	765.0204595159142
2015	750.1242393271385
2016	766.9423558136388
2017	785.6935677231845
2018	806.6089504353924
2019	830.1759263855333
2020	847.6188003968974