Directions: Study the given information and answer the question that follows. The table below shows the distribution of students in an institution in three grades - Average, Good and Outstanding - across three levels - Primary, Secondary and Higher Secondary - on the basis of their performance in the final examination over a period of six years beginning 2012. Level Primary Secondary Higher Secondary Grade Average Good Outstanding Average Good Outstanding Average Good Outstanding 2012 120 75 35 100 68 24 98 82 29 2013 115 68 34 98 75 22 89 78 37 2014 132 54 30 105 60 25 95 90 29 2015 145 64 25 110 70 28 102 75 34 2016 128 60 28 125 78 18 99 88 28 2017 110 80 32 120 56 21 110 90 32 For which year was the percentage of students securing a Good grade the highest among students of the Secondary level?