Year	% of total final energy consumption
1990	0.7
1991	0.6
1992	0.8
1993	0.8
1994	1
1995	1.1
1996	0.9
1997	1
1998	1
1999	0.9
2000	1
2001	0.8
2002	1
2003	0.9
2004	1.1
2005	1.4
2006	1.6
2007	1.8
2008	2.4
2009	3
2010	3.2
2011	4
2012	4.2
2013	5.2
2014	6.6
2015	7.7
2016	7.7
2017	8.8
2018	10.2
2019	11.4
2020	13.6
2021	12.2