Frequencies for first 10,000 rows of d_vision2 variable in vehicle dataset :

 DRI VISION |
OBSCURED BY |
          2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,651       96.51       96.51
          3 |          2        0.02       96.53
          4 |          3        0.03       96.56
          5 |          3        0.03       96.59
          7 |          1        0.01       96.60
         99 |        340        3.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016