Year	cubic meters
1961	2283.9897064173215
1962	2269.1557059521165
1963	2254.513149110138
1964	2240.0611952158893
1965	2226.8255661013045
1966	2205.5169147743095
1967	2169.5236498042773
1968	2140.4223096651685
1969	2118.0319534956548
1970	2092.798373641842
1971	2071.200118739684
1972	2051.509740290388
1973	2034.0107913919396
1974	2015.2710755960136
1975	1990.2709656707377
1976	1966.440224439595
1977	1947.959781019536
1978	1930.6229415951486
1979	1918.4727833989
1980	1908.3830249915322
1981	1895.93644183998
1982	1885.588555233841
1983	1878.5062976059287
1984	1871.8629015456208
1985	1864.2502909536927
1986	1855.7733094520386
1987	1846.6689586625898
1988	1838.0007478642024
1989	1829.7639120991435
1990	1826.5796649273645
1991	1842.5161692967158
1992	1859.2380440640295
1993	1861.7703599832714
1994	1864.478952703079
1995	1868.2549625797967
1996	1873.6457184410067
1997	1879.047678418415
1998	1882.9409636250284
1999	1885.899099503205
2000	1888.341788616133
2001	1914.876985645652
2002	1950.2546099269891
2003	1964.3719113171835
2004	1975.5965807541652
2005	1987.834248020081
2006	1999.6451785808656
2007	2029.4036550910212
2008	2063.504622557105
2009	2080.76725420274
2010	2093.1629386091313
2011	2103.483861642977
2012	2112.8689824302332
2013	2120.7291365014466
2014	2128.6877644504025
2015	2138.7172621835225
2016	2151.02150427664
2017	2163.4905607641954
2018	2176.2383325023097
2019	2187.7333306902956
2020	2199.8157303954013