Frequencies for first 10,000 rows of traf_flo variable in accident dataset : TRAFFICWAY | FLOW | Freq. Percent Cum. ------------+----------------------------------- 1 | 5,813 58.13 58.13 2 | 3,233 32.33 90.46 3 | 821 8.21 98.67 4 | 50 0.50 99.17 9 | 83 0.83 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016