Year	% of total final energy consumption
1990	67.1
1991	64.7
1992	61.7
1993	59.3
1994	57.2
1995	54.7
1996	56.9
1997	53
1998	51.7
1999	51
2000	33.5
2001	33.1
2002	34
2003	33.9
2004	33.3
2005	34.1
2006	34.8
2007	28.2
2008	31.5
2009	32.2
2010	32.6
2011	29.5
2012	30.3
2013	27.5
2014	24
2015	21
2016	20.7
2017	25
2018	23.2
2019	19.4
2020	23.7
2021	21.9