Year	billion cubic meters
2005	0.01
2006	0.0104555556
2007	0.0109111111
2008	0.0113666667
2009	0.0118222222
2010	0.0122777778
2011	0.0127333333
2012	0.0131888889
2013	0.0136444444
2014	0.0141
2015	0.0141
2016	0.0141
2017	0.0141
2018	0.0141
2019	0.0141
2020	0.0141