Year	cubic meters
1961	1396.1257510408618
1962	1241.0522350021054
1963	1099.116781157998
1964	973.3882602423042
1965	863.6244467405888
1966	766.0529123690186
1967	678.6480361622454
1968	602.008127109716
1969	535.7980041524346
1970	474.54812002677807
1971	420.74893310091966
1972	377.516212973075
1973	342.0181513918917
1974	312.3274530253933
1975	287.11617438205934
1976	265.41542253187356
1977	246.50382741210598
1978	229.86241092831577
1979	215.08019418668962
1980	201.83816903946655
1981	189.90325107583584
1982	179.1380898761388
1983	169.46382855102377
1984	160.8081759471171
1985	153.06066668853248
1986	146.47109288359732
1987	140.91914512407175
1988	135.87549922114223
1989	131.17949102357483
1990	126.790060564895
1991	122.67627046612603
1992	118.82204912867367
1993	115.21661752815092
1994	111.84721670198509
1995	108.70978951067006
1996	105.80710985990005
1997	101.70889099167985
1998	96.38603985906984
1999	91.3090125256399
2000	86.69576135133923
2001	82.49475937309876
2002	78.52089076341936
2003	74.81380047426606
2004	71.98470839123175
2005	65.98249107468983
2006	55.169152562410105
2007	45.458493554229136
2008	38.773725538799
2009	34.77669017819328
2010	32.68156946234149
2011	31.039186418582272
2012	29.386144432899886
2013	27.51165437894651
2014	25.288275046117235
2015	23.192506501149477
2016	21.578581100399745
2017	20.650833132049172
2018	20.240485887321217
2019	19.9484546181563
2020	20.287025179458663