Frequencies for first 10,000 rows of prev_dwi variable in vehicle dataset : Previous | DWI | Convictions | Freq. Percent Cum. ------------+----------------------------------- 0 | 8,612 86.12 86.12 1 | 586 5.86 91.98 2 | 108 1.08 93.06 3 | 24 0.24 93.30 4 | 7 0.07 93.37 5 | 2 0.02 93.39 10 | 1 0.01 93.40 99 | 660 6.60 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016