Year	billion cubic meters
1961	225.668
1962	225.668
1963	225.668
1964	225.668
1965	225.668
1966	225.668
1967	225.668
1968	225.668
1969	225.668
1970	225.668
1971	225.668
1972	225.668
1973	225.668
1974	225.668
1975	225.668
1976	225.668
1977	225.668
1978	225.668
1979	225.668
1980	225.668
1981	225.668
1982	225.668
1983	225.668
1984	225.668
1985	225.668
1986	225.668
1987	225.668
1988	225.668
1989	225.668
1990	225.668
1991	225.668
1992	225.668
1993	225.668
1994	225.668
1995	225.668
1996	225.668
1997	225.668
1998	225.668
1999	225.668
2000	225.668
2001	225.668
2002	225.668
2003	225.668
2004	225.668
2005	225.668
2006	225.668
2007	225.668
2008	225.668
2009	225.668
2010	225.668
2011	225.668
2012	225.668
2013	225.668
2014	225.668
2015	225.668
2016	225.668
2017	225.668
2018	225.668
2019	225.668
2020	225.668