Year	billion cubic meters
1992	224.45999999999998
1993	250.20999999999998
1994	250.20999999999998
1995	250.20999999999998
1996	250.20999999999998
1997	250.20999999999998
1998	250.20999999999998
1999	250.20999999999998
2000	250.20999999999998
2001	250.20999999999998
2002	250.20999999999998
2003	250.20999999999998
2004	250.20999999999998
2005	250.20999999999998
2006	250.20999999999998
2007	250.20999999999998
2008	250.20999999999998
2009	250.20999999999998
2010	250.20999999999998
2011	250.20999999999998
2012	250.20999999999998
2013	250.20999999999998
2014	250.20999999999998
2015	250.20999999999998
2016	250.20999999999998
2017	250.20999999999998
2018	250.20999999999998
2019	250.20999999999998
2020	250.20999999999998