Year	billion cubic meters
2000	8.5556
2001	8.57604
2002	8.59648
2003	8.61692
2004	8.63736
2005	8.6578
2006	8.6578
2007	8.6578
2008	8.6578
2009	8.6578
2010	8.6578
2011	8.6578
2012	8.6578
2013	8.6578
2014	8.6578
2015	8.6578
2016	8.6578
2017	8.6578
2018	8.6578
2019	8.6578
2020	8.6578