Year	billion cubic meters
1961	76.84
1962	76.84
1963	76.84
1964	76.84
1965	76.84
1966	76.84
1967	76.84
1968	76.84
1969	76.84
1970	76.84
1971	76.84
1972	76.84
1973	76.84
1974	76.84
1975	76.84
1976	76.84
1977	76.84
1978	76.84
1979	76.84
1980	76.84
1981	76.84
1982	76.84
1983	76.84
1984	76.84
1985	76.84
1986	76.84
1987	76.84
1988	76.84
1989	76.84
1990	76.84
1991	76.84
1992	76.84
1993	76.84
1994	76.84
1995	76.84
1996	76.84
1997	76.84
1998	76.84
1999	76.84
2000	76.84
2001	76.84
2002	76.84
2003	76.84
2004	76.84
2005	76.84
2006	76.84
2007	76.84
2008	76.84
2009	76.84
2010	76.84
2011	76.84
2012	76.84
2013	76.84
2014	76.84
2015	76.84
2016	76.84
2017	76.84
2018	76.84
2019	76.84
2020	76.84