Year 1=extremely underdeveloped to 7=well developed and efficient by international standards 2007 4.11252055826025 2008 4.18694833818134 2009 4.40227276191429 2010 4.53264282761333 2011 4.46 2012 4.47142857142857 2013 4.36666666666667 2014 4.22 2015 4.41213084700868 2016 4.42307692307692 2017 4.25714285714286