Frequencies for first 10,000 rows of drl variable in vindecode dataset : (daytime | running | lights)a | polk | assigned | code that | identifies | whether or | not the | Freq. Percent Cum. ------------+----------------------------------- | 2,865 28.65 28.65 N | 2,839 28.39 57.04 O | 1,228 12.28 69.32 S | 2,783 27.83 97.15 U | 285 2.85 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016