Year	cubic meters
1961	16357.042406421975
1962	16129.08756261833
1963	15716.126020058287
1964	15326.824585712122
1965	14947.113325009428
1966	14543.755400256317
1967	14168.293518093
1968	13799.791244185915
1969	13431.539482732831
1970	13073.003052841743
1971	12727.027242562166
1972	12413.398242177549
1973	12120.93250650667
1974	11852.186320678968
1975	11610.663656662782
1976	11389.307447083884
1977	11185.585953060507
1978	10987.674103069778
1979	10794.018562589039
1980	10609.430435709382
1981	10424.888902383405
1982	10232.848220361697
1983	10048.685021764559
1984	9876.306203046544
1985	9706.363149680878
1986	9534.141125301992
1987	9360.35842508091
1988	9191.636631113337
1989	9031.353342893486
1990	8877.352149043918
1991	8733.936470952627
1992	8297.571580772437
1993	8188.682798529673
1994	8084.96417120266
1995	7985.121514503673
1996	7888.33024288544
1997	7795.504739684693
1998	7707.093548278089
1999	7624.751323543908
2000	7547.496890611419
2001	7474.435001701535
2002	7406.604656507463
2003	7342.252483705113
2004	7278.893066110635
2005	7216.626972544645
2006	7140.241185011411
2007	7086.406123164102
2008	7029.946746141663
2009	6973.068999656829
2010	6918.225923893373
2011	6861.284253376001
2012	6799.401421589321
2013	6737.268100805939
2014	6677.479783057895
2015	6619.579365784564
2016	6565.50572091139
2017	6512.829430712211
2018	6464.251652226781
2019	6420.879338277188
2020	6385.840278292181