Year	% of total final energy consumption
1990	4.3
1991	4.5
1992	4
1993	4.2
1994	3.3
1995	3.7
1996	3.6
1997	3.8
1998	3.8
1999	3.7
2000	3.7
2001	3.5
2002	3.7
2003	4.2
2004	4.3
2005	4
2006	4.4
2007	4.3
2008	4.4
2009	4.5
2010	4.7
2011	4.8
2012	4.7
2013	5
2014	5.6
2015	6.2
2016	6.4
2017	6.9
2018	7.3
2019	7.8
2020	8.5
2021	8.8