Frequencies for first 10,000 rows of cf3 variable in accident dataset : Accident | Related | Factor 3 | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,855 98.55 98.55 99 | 145 1.45 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016