Year 1=extremely underdeveloped to 7=well developed and efficient by international standards 2007 3.082869703728 2008 3.18868490051143 2009 3.37442555546471 2010 3.55072674895833 2011 3.45384615384615 2012 3.49024390243902 2013 3.34651162790698 2014 3.08333333333333 2015 3.00219861698314 2016 3.00243902439024 2017 2.965