Year	billion cubic meters
1993	0.9275
1994	0.9571428571
1995	0.9867857143
1996	1.0164285714
1997	1.0460714286
1998	1.0757142857
1999	1.1053571429
2000	1.135
2001	1.1646428571
2002	1.1942857143
2003	1.2239285714
2004	1.2535714286
2005	1.2832142857
2006	1.3128571429
2007	1.3425
2008	1.3721428571
2009	1.4017857143
2010	1.4314285714
2011	1.4610714286
2012	1.4907142857
2013	1.5203571429
2014	1.55
2015	0.83
2016	1.35
2017	1.35
2018	1.35
2019	1.35
2020	1.35