Frequencies for first 10,000 rows of profile variable in accident dataset : Roadway | Profile | Freq. Percent Cum. ------------+----------------------------------- 1 | 7,500 75.00 75.00 2 | 2,197 21.97 96.97 3 | 80 0.80 97.77 4 | 49 0.49 98.26 9 | 174 1.74 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016