Year	billion cubic meters
1961	13847.806
1962	13867.706
1963	13867.706
1964	13867.706
1965	13867.706
1966	13867.706
1967	13867.705999999998
1968	13867.706
1969	13867.706
1970	13867.706000000002
1971	13867.705999999998
1972	13867.706
1973	13867.706
1974	13867.706
1975	13867.706
1976	13867.706
1977	13867.706
1978	13867.706
1979	13867.706
1980	13867.705999999998
1981	13867.706
1982	13867.706
1983	13867.706
1984	13867.706
1985	13867.705999999998
1986	13867.705999999998
1987	13867.706
1988	13867.706
1989	13867.706
1990	13867.706
1991	13867.706
1992	13867.705999999998
1993	13867.706
1994	13867.706
1995	13867.705999999998
1996	13867.706
1997	13867.706
1998	13867.705999999998
1999	13867.706
2000	13867.706
2001	13867.705999999998
2002	13867.706
2003	13867.706
2004	13867.706
2005	13867.706
2006	13867.706
2007	13867.706
2008	13867.706
2009	13867.706
2010	13867.706
2011	13867.706
2012	13867.706
2013	13867.706
2014	13867.705999999998
2015	13867.706
2016	13867.706
2017	13867.706
2018	13867.706
2019	13867.706
2020	13867.706000000002