Year	cubic meters
1992	3914.4490618248747
1993	3928.410263022176
1994	3985.5650081885237
1995	4068.6021326303594
1996	4130.765330354988
1997	4196.445835361724
1998	4269.608350517926
1999	4310.583322738297
2000	4323.543201098979
2001	4330.902486718734
2002	4330.723817056227
2003	4316.1793542553
2004	4286.289787559888
2005	4248.3578792910475
2006	4203.661006585736
2007	4155.85133534898
2008	4078.738219038447
2009	3998.677174208476
2010	3942.562470775411
2011	3886.5262379476912
2012	3832.161452207557
2013	3777.394696537846
2014	3722.173714743828
2015	3668.170302972055
2016	3616.3763683994457
2017	3567.512979427175
2018	3520.924083076956
2019	3475.809473355179
2020	3430.9632086645174