Year	cubic meters
1961	64730.02872130919
1962	63071.79872722233
1963	61448.67157818423
1964	59857.64891943622
1965	58299.92908860257
1966	56767.82850927514
1967	55250.167676881276
1968	53743.48061279688
1969	52245.43759352243
1970	50754.91535751868
1971	49265.714264412454
1972	47794.02900828099
1973	46364.066610167625
1974	44981.70365866762
1975	43647.99305362266
1976	42362.24445478849
1977	41121.923207675965
1978	39924.56271645303
1979	38769.994877068624
1980	37661.365540766914
1981	36601.35262090665
1982	35582.341444769765
1983	34599.27672111381
1984	33649.468593013866
1985	32725.60810880362
1986	31827.198522764666
1987	30944.36130379154
1988	30071.057820397975
1989	29211.040143596965
1990	28360.40981044643
1991	27520.852966780614
1992	26696.575280935904
1993	25883.05773381157
1994	25081.643727382332
1995	24298.55409903629
1996	23537.704399120124
1997	22802.77500975546
1998	22097.007304601804
1999	21422.825225662764
2000	20781.391417137347
2001	20167.968657660105
2002	19579.438312975173
2003	19013.434091369425
2004	18464.970307560652
2005	17932.99986467769
2006	17415.75156022137
2007	16913.46099700687
2008	16428.12653206295
2009	15958.636728958705
2010	15507.76209509958
2011	15079.54257348637
2012	14673.712370853913
2013	14286.881340413012
2014	13916.432688899262
2015	13560.870522578809
2016	13214.680404130808
2017	12877.56583588662
2018	12552.827569108436
2019	12239.79805568084
2020	11939.69483344604