Year	billion cubic meters
1991	1.197
1992	1.2106313131
1993	1.2242626263
1994	1.2378939394
1995	1.2175252525
1996	1.2311565657
1997	1.2447878788
1998	1.2584191919
1999	1.2720505051
2000	1.3
2001	1.2710909091
2002	1.2565
2003	1.186
2004	1.2308
2005	1.2756
2006	1.3204
2007	1.3652
2008	1.41
2009	1.4548
2010	1.4996
2011	1.5444
2012	1.5892
2013	1.634
2014	1.634
2015	1.634
2016	1.634
2017	1.634
2018	1.634
2019	1.634
2020	1.634