kareem and magic point per shot efficiency

stats from http://basketballreference.com/players/playerpage.htm?ilkid=JOHNSMA01

[root@archgav hoops]# cat kareff |sort -rn
1.25453 1979-80
1.23745 1984-85
1.21839 1982-83
1.20946 1980-81
1.20202 1978-79
1.19861 1983-84
1.19343 1981-82
1.19289 1976-77
1.19047 1970-71
1.1869 1985-86
1.18189 1971-72
1.17218 1986-87
1.15913 1977-78
1.14645 1972-73
1.12578 1987-88
1.11072 1973-74
1.11017 1975-76
1.08514 1974-75
1.08256 1969-70
1.00796 1988-89
[root@archgav hoops]# vi mag
[root@archgav hoops]# awk '{g=$5;p=$8;f=($10/g);t=(($13/g)/2);e=(p/(f+t));print e" "$1}' mag > mageff
[root@archgav hoops]# cat mageff
1.17458 1979-80
1.14253 1980-81
1.15832 1981-82
1.18183 1982-83
1.22961 1983-84
1.24589 1984-85
1.1926 1985-86
1.1777 1986-87
1.13761 1987-88
1.22136 1988-89
1.20954 1989-90
1.21394 1990-91
1.18428 1995-96