wilt points per shot

$ awk '{a=$8;f=$11;p=$16;t=(a+(f/2));e=(p/t);print e" "$1}' wilt
0.964103 1959-60
1.01722 1960-61
1.05 1961-62
1.07822 1962-63
1.05278 1963-64
1.00434 1964-65
0.967662 1964-65
1.05429 1964-65
1.06688 1965-66
1.22959 1966-67
1.08 1967-68
1.08466 1968-69
1.07269 1969-70
1.08377 1970-71
1.184 1971-72
1.3401 1972-73