Year	billion cubic meters
1961	2812.9
1962	2812.9
1963	2812.9
1964	2812.9
1965	2812.9
1966	2812.9
1967	2812.9
1968	2812.9
1969	2812.9
1970	2812.9
1971	2812.9
1972	2812.9
1973	2812.9
1974	2812.9
1975	2812.9
1976	2812.9
1977	2812.9
1978	2812.9
1979	2812.9
1980	2812.9
1981	2812.9
1982	2812.9
1983	2812.9
1984	2812.9
1985	2812.9
1986	2812.9
1987	2812.9
1988	2812.9
1989	2812.9
1990	2812.9
1991	2812.9
1992	2812.9
1993	2812.9
1994	2812.9
1995	2812.9
1996	2812.9
1997	2812.9
1998	2812.9
1999	2812.9
2000	2812.9
2001	2812.9
2002	2812.9
2003	2812.9
2004	2812.9
2005	2812.9
2006	2812.9
2007	2812.9
2008	2812.9
2009	2812.9
2010	2812.9
2011	2812.9
2012	2812.9
2013	2812.9
2014	2812.9
2015	2812.9
2016	2812.9
2017	2812.9
2018	2812.9
2019	2812.9
2020	2812.9