Year	billion cubic meters
1961	224.51
1962	224.51
1963	224.51
1964	224.51
1965	224.51
1966	224.51
1967	224.51
1968	224.51
1969	224.51
1970	224.51
1971	224.51
1972	224.51
1973	224.51
1974	224.51
1975	224.51
1976	224.51
1977	224.51
1978	224.51
1979	224.51
1980	224.51
1981	224.51
1982	224.51
1983	224.51
1984	224.51
1985	224.51
1986	224.51
1987	224.51
1988	224.51
1989	224.51
1990	224.51
1991	224.51
1992	224.51
1993	224.51
1994	224.51
1995	224.51
1996	224.51
1997	224.51
1998	224.51
1999	224.51
2000	224.51
2001	224.51
2002	224.51
2003	224.51
2004	224.51
2005	224.51
2006	224.51
2007	224.51
2008	224.51
2009	224.51
2010	224.51
2011	224.51
2012	224.51
2013	224.51
2014	224.51
2015	224.51
2016	224.51
2017	224.51
2018	224.51
2019	224.51
2020	224.51