Year	billion cubic meters
1990	2.049
1991	2.0000923077
1992	1.9511846154
1993	1.9022769231
1994	1.8533692308
1995	1.8044615385
1996	1.7555538462
1997	1.7066461538
1998	1.6577384615
1999	1.6088307692
2000	1.5599230769
2001	1.8132820513
2002	2.0666410256
2003	2.32
2004	2.4482857143
2005	2.5765714286
2006	2.7048571429
2007	2.8331428571
2008	2.9614285714
2009	3.0897142857
2010	3.218
2011	3.2184
2012	3.2188
2013	3.2192
2014	3.2196
2015	3.22
2016	4.032
2017	4.032
2018	4.032
2019	4.032
2020	4.032