Frequencies for first 10,000 rows of aut_rest variable in person dataset : Automatic | Restraint-F | unction | Freq. Percent Cum. ------------+----------------------------------- 0 | 8,386 83.86 83.86 1 | 4 0.04 83.90 2 | 2 0.02 83.92 3 | 2 0.02 83.94 9 | 1,606 16.06 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016