Year	billion cubic meters
1992	42636.645099999994
1993	42787.19509999998
1994	42773.1951
1995	42773.1951
1996	42772.29509999998
1997	42773.1951
1998	42773.1951
1999	42773.1951
2000	42773.19509999998
2001	42773.19509999998
2002	42773.19509999999
2003	42773.195099999975
2004	42770.195099999975
2005	42770.1951
2006	42778.6021
2007	42778.60209999999
2008	42778.60209999999
2009	42778.602099999975
2010	42778.6021
2011	42778.6021
2012	42808.60209999999
2013	42808.60209999996
2014	42808.6021
2015	42808.6021
2016	42808.60209999996
2017	42808.60209999999
2018	42808.60209999996
2019	42808.60209999996
2020	42808.6021