Year	cubic meters
1992	9351.374256322822
1993	9373.685198815512
1994	9384.536274726142
1995	9382.513046065276
1996	9388.382341996594
1997	9401.013919744446
1998	9421.54157009208
1999	9414.814086417606
2000	9386.98040398708
2001	9372.207664427779
2002	9360.601244403444
2003	9354.958804609636
2004	9348.967357231704
2005	9332.788129213377
2006	9303.053314916577
2007	9251.17510239718
2008	9236.556777861551
2009	9153.445975793133
2010	9113.616582779414
2011	9094.704271101104
2012	9075.623226012187
2013	9063.313580455477
2014	9054.404019437628
2015	9047.598509545047
2016	9040.978343297618
2017	9035.089247517892
2018	9002.388743108375
2019	8939.922475980244
2020	8880.246991679585