Year	billion cubic meters
1995	5.211
1996	5.2160659091
1997	5.2211318182
1998	5.2261977273
1999	5.2312636364
2000	5.2363295455
2001	5.2409954545
2002	5.2460613636
2003	5.2511272727
2004	5.2561931818
2005	5.2612590909
2006	5.266325
2007	4.9363
2008	5.73785
2009	6.0564
2010	6.01895
2011	6.3321666667
2012	6.6453833333
2013	6.958
2014	6.958
2015	6.958
2016	6.958
2017	6.958
2018	6.958
2019	6.958
2020	6.958