Year	billion cubic meters
1993	0.007
1994	0.008473913
1995	0.0099478261
1996	0.0114217391
1997	0.0128956522
1998	0.0143695652
1999	0.0158434783
2000	0.0173173913
2001	0.0187913043
2002	0.0202652174
2003	0.0217391304
2004	0.0232130435
2005	0.0246869565
2006	0.0261608696
2007	0.0276347826
2008	0.0291086957
2009	0.0305826087
2010	0.0320565217
2011	0.0335304348
2012	0.0350043478
2013	0.0364782609
2014	0.0379521739
2015	0.039426087
2016	0.0409
2017	0.0409
2018	0.0409
2019	0.0409
2020	0.0409