Year	% of total final energy consumption
1990	0.5
1991	0.4
1992	0.3
1993	0.3
1994	0.7
1995	3.3
1996	3.3
1997	3.3
1998	3.2
1999	3.2
2000	3.1
2001	3
2002	3.2
2003	3.2
2004	3.3
2005	3.4
2006	3.5
2007	4.3
2008	5.7
2009	6.3
2010	6.5
2011	7.6
2012	8.6
2013	9.7
2014	9.5
2015	10.4
2016	10.3
2017	10.9
2018	12
2019	12
2020	15
2021	15.6