Year	billion cubic meters
1992	64.35
1993	64.35
1994	64.35
1995	64.35
1996	64.35
1997	64.35
1998	64.35
1999	64.35
2000	64.35
2001	64.35
2002	64.35
2003	64.35
2004	64.35
2005	64.35
2006	64.35
2007	64.35
2008	64.35
2009	64.35
2010	64.35
2011	64.35
2012	64.35
2013	64.35
2014	64.35
2015	64.35
2016	64.35
2017	64.35
2018	64.35
2019	64.35
2020	64.35