Year	PPP $ per kg of oil equivalent
2000	1.3925503429247281
2001	1.3567776664566282
2002	1.4090984402043751
2003	1.5110644316347464
2004	1.4703329623070387
2005	1.5864961657648902
2006	1.6864420532754318
2007	1.564137039806677
2008	1.702834463014834
2009	1.662581606637913
2010	1.8932647433415704
2011	1.6341682094942915
2012	1.8742291460579863
2013	2.116544507138474
2014	1.9245932406165025