Year	% of total final energy consumption
1990	2.3
1991	2.2
1992	2.2
1993	2.1
1994	2.2
1995	1.9
1996	2
1997	1.9
1998	2.3
1999	2.1
2000	2
2001	2
2002	2.2
2003	2
2004	2.3
2005	2.9
2006	3.2
2007	3.5
2008	4.2
2009	5.3
2010	5.3
2011	7
2012	6.9
2013	7.7
2014	8.8
2015	9.5
2016	8.6
2017	10.1
2018	10.8
2019	12.3
2020	13.7
2021	12.7