Year	% of total final energy consumption
1990	1.3
1991	1.2
1992	1.2
1993	1
1994	0.9
1995	1.3
1996	1.2
1997	1.1
1998	1.3
1999	1.4
2000	1.4
2001	1.6
2002	1.7
2003	1.9
2004	2
2005	2.5
2006	2.9
2007	3.4
2008	4
2009	4.9
2010	6.2
2011	6.7
2012	7.7
2013	8.3
2014	9.1
2015	9.4
2016	9.2
2017	9.7
2018	10.7
2019	10.2
2020	12.3
2021	11.7