Year	billion cubic meters
1961	38.12
1962	38.12
1963	38.12
1964	38.12
1965	38.12
1966	38.12
1967	38.12
1968	38.12
1969	38.12
1970	38.12
1971	38.12
1972	38.12
1973	38.12
1974	38.12
1975	38.12
1976	38.12
1977	38.12
1978	38.12
1979	38.12
1980	38.12
1981	38.12
1982	38.12
1983	38.12
1984	38.12
1985	38.12
1986	38.12
1987	38.12
1988	38.12
1989	38.12
1990	38.12
1991	38.12
1992	38.12
1993	38.12
1994	38.12
1995	38.12
1996	38.12
1997	38.12
1998	38.12
1999	38.12
2000	38.12
2001	38.12
2002	38.12
2003	38.12
2004	38.12
2005	38.12
2006	38.12
2007	38.12
2008	38.12
2009	38.12
2010	38.12
2011	38.12
2012	38.12
2013	38.12
2014	38.12
2015	38.12
2016	38.12
2017	38.12
2018	38.12
2019	38.12
2020	38.12