Year	billion cubic meters
1992	31.5995
1993	32.2743214286
1994	32.9491428571
1995	33.6239642857
1996	34.2987857143
1997	34.9736071429
1998	35.6484285714
1999	36.32325
2000	42
2001	40.9391666667
2002	39.8783333333
2003	38.8175
2004	39.5380833333
2005	40.2586666667
2006	40.97925
2007	41.469625
2008	41.96
2009	45.13
2010	46.96
2011	48.735
2012	50.51
2013	51.24
2014	51.97
2015	53.71
2016	59.61
2017	58.788985
2018	61.09358
2019	61.53358
2020	61.53358