Frequencies for pveh_sc2 variable in parkwork dataset : vehicle | related | factors (2) | Freq. Percent Cum. ------------+----------------------------------- 0 | 1,132 99.65 99.65 99 | 4 0.35 100.00 ------------+----------------------------------- Total | 1,136 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016