Year	1=extremely underdeveloped to 7=well developed and efficient by international standards
2007	6.53982924093232
2008	6.63730272592593
2009	6.77957625
2010	6.8173459815
2011	6.6
2012	6.5
2013	6.6
2014	6.5
2015	6.35201268689386
2016	6.4
2017	6.5