Year	billion cubic meters
1990	37.1064201759
1991	37.2900875486
1992	39.208554921499996
1993	39.37335562750001
1994	41.95388024660001
1995	43.1053902826
1996	43.8391869851
1997	44.5867836876
1998	45.334380390099994
1999	46.0980770925
2000	47.3586350072
2001	48.722671793299995
2002	55.6586436446
2003	57.02385235170001
2004	58.2059977515
2005	59.345993150899986
2006	59.906224135
2007	60.4238005733
2008	61.2343292846
2009	61.72825875339999
2010	62.361968904
2011	62.7966183403
2012	90.8977393676
2013	90.20676039490002
2014	92.6899352682
2015	95.15636014169999
2016	96.6592785865
2017	96.930950391
2018	97.6402038465
2019	98.037075651
2020	98.37750325100001