Year	billion cubic meters
1992	34
1993	34
1994	34
1995	34
1996	34
1997	34
1998	34
1999	34
2000	34
2001	34
2002	34
2003	34
2004	34
2005	34
2006	34
2007	34
2008	34
2009	34
2010	34
2011	34
2012	34
2013	34
2014	34
2015	34
2016	34
2017	34
2018	34
2019	34
2020	34