Year	billion cubic meters
1993	18.5502
1994	21.1102
1995	19.8502
1996	22.1602
1997	21.9282
1998	21.8222
1999	21.7162
2000	21.65924
2001	21.534
2002	20.8338
2003	20.1336
2004	19.4334
2005	18.7332
2006	17.55665
2007	16.3801
2008	15.20355
2009	14.027
2010	13.175
2011	13.215
2012	15.868
2013	19.148
2014	18.463
2015	9.22
2016	10.623
2017	12.05864137
2018	12.33
2019	10.53
2020	8.64