Year	cubic meters
1961	393481.8575880594
1962	384622.402598338
1963	376193.74588464707
1964	368206.62229493394
1965	360457.17309774464
1966	352631.97284601734
1967	344865.1473943307
1968	337212.61149907636
1969	329504.60771674284
1970	321808.3621159643
1971	314202.0503547031
1972	306814.26437353966
1973	299759.2944092833
1974	293050.9605010476
1975	286638.35829580075
1976	280478.1925579086
1977	274543.35317174695
1978	268827.4892720716
1979	263322.0925591949
1980	257988.62917532536
1981	252755.3009981152
1982	247584.1229649265
1983	242457.11672176185
1984	237370.96102641456
1985	232336.95297482668
1986	227368.46407918894
1987	222478.80271407476
1988	217683.6879367092
1989	212799.19407286498
1990	207246.00333456488
1991	200701.82999477576
1992	193635.22701010772
1993	186644.19790529754
1994	179931.50472606608
1995	173510.3615579021
1996	167366.8143576071
1997	161477.6434101901
1998	155872.08681199548
1999	150524.6375569682
2000	145416.99548880535
2001	140563.577467641
2002	135933.29663190892
2003	131505.93172198892
2004	127280.92664328257
2005	123253.18234792851
2006	119405.79739743065
2007	115733.61675788094
2008	112216.4957408166
2009	108847.9376645119
2010	105627.26971705738
2011	102605.00135974045
2012	99793.87146026093
2013	97142.4004505661
2014	94634.39519583354
2015	92257.99897583255
2016	90008.40415548913
2017	87879.09241194208
2018	85859.20355459247
2019	83940.39037626043
2020	82156.87963863282