Year	billion cubic meters
1992	16.202
1993	16.338
1994	14.633
1995	13.97
1996	13.457
1997	12.518
1998	10.235
1999	11.968
2000	10.99
2001	9.923
2002	9.919
2003	10.518
2004	11.175
2005	11.8
2006	12.144
2007	12.085
2008	11.53
2009	11.14
2010	10.97
2011	11.296
2012	11.975
2013	11.994
2014	11.592
2015	11.689
2016	11.878
2017	12.12
2018	12.167
2019	12.59
2020	12.59