Year	cubic meters
1961	5845.260621748318
1962	5684.570483144254
1963	5524.720782331418
1964	5365.65274063345
1965	5209.383571412298
1966	5059.314059380992
1967	4917.090394220931
1968	4781.341619900681
1969	4648.439598410993
1970	4516.742792236335
1971	4389.608386126488
1972	4267.462072889315
1973	4147.583211331985
1974	4028.7771949514936
1975	3910.889425734127
1976	3797.162382029405
1977	3684.429660467334
1978	3570.0730748117007
1979	3453.8356430624012
1980	3335.8718842437397
1981	3174.701135241008
1982	3023.527277510157
1983	2918.598184345748
1984	2816.2283658323163
1985	2718.6469135635307
1986	2627.100717133074
1987	2542.465605980354
1988	2465.849046132831
1989	2395.3888038520686
1990	2303.1303448642852
1991	2215.86555252142
1992	2164.319298169023
1993	2150.432186664877
1994	2142.175469043489
1995	2113.667303404144
1996	2086.093890329385
1997	2056.640585956589
1998	2024.8522326658901
1999	1993.0284330709644
2000	1960.5036178309892
2001	1927.2633995087594
2002	1908.592046203315
2003	1890.9656269686368
2004	1860.655737942292
2005	1830.9383092907624
2006	1802.8569600660871
2007	1776.8395204729109
2008	1752.6297698228361
2009	1728.9472251977982
2010	1704.8351845610125
2011	1683.1935974826026
2012	1661.8288049662326
2013	1637.79958859494
2014	1607.019923245227
2015	1571.080556562562
2016	1542.5016647314173
2017	1520.6187140758266
2018	1500.8603024692527
2019	1484.4473469529587
2020	1472.1012244754688