Year	cubic meters
1961	12827.649939482575
1962	12625.859572923226
1963	12311.766118047779
1964	12011.33130055941
1965	11719.866833301543
1966	11423.257683736676
1967	11142.262440284383
1968	10865.92819669147
1969	10591.628577398007
1970	10325.1439090417
1971	10070.328780983245
1972	9831.075056713908
1973	9599.45118541303
1974	9380.75077249693
1975	9177.444048613343
1976	8985.249900440833
1977	8801.621270402351
1978	8623.182773152144
1979	8447.71547942465
1980	8273.731696887933
1981	8099.901278741247
1982	7926.337081795093
1983	7759.839094427715
1984	7601.502559998271
1985	7446.2583593600675
1986	7292.296117137179
1987	7140.619499395065
1988	6993.857658939847
1989	6853.131389205086
1990	6713.673561501994
1991	6584.978712188619
1992	6337.860716824639
1993	6229.789776808882
1994	6121.829040722538
1995	6021.373644981178
1996	5924.4640365986825
1997	5831.118430892605
1998	5741.050512195413
1999	5655.188496751101
2000	5572.199642527058
2001	5491.971090247561
2002	5416.109546935905
2003	5343.694452416619
2004	5272.401661572672
2005	5204.093357523618
2006	5132.959575701587
2007	5070.978822861511
2008	5009.49264261063
2009	4948.621768577724
2010	4888.2233032606955
2011	4827.640429551488
2012	4766.973543592153
2013	4706.944685711267
2014	4648.65284663842
2015	4592.912182043627
2016	4539.5544079565725
2017	4487.516976720035
2018	4438.072118796095
2019	4391.6795866460725
2020	4348.79143871068