Year	1=extremely underdeveloped to 7=well developed and efficient by international standards
2007	6.19292878938941
2008	6.3460845377392
2009	6.4548815983
2010	6.3583996443
2011	6.2
2012	6.3
2013	6.4
2014	6.4
2015	6.3613692037987
2016	6.4
2017	6.2