Year	billion cubic meters
1996	0.0166
1997	0.0166
1998	0.0166
1999	0.0166
2000	0.0166
2001	0.0166
2002	0.0166
2003	0.0166
2004	0.0166
2005	0.0171666667
2006	0.0177333333
2007	0.0183
2008	0.0188666667
2009	0.0194333333
2010	0.02
2011	0.02
2012	0.02
2013	0.02
2014	0.02
2015	0.02
2016	0.02
2017	0.02
2018	0.02
2019	0.02
2020	0.02