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

 Compliance |
   with CDL |
endorsement |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,476       94.76       94.76
          1 |        159        1.59       96.35
          2 |          2        0.02       96.37
          3 |         79        0.79       97.16
          7 |         61        0.61       97.77
          8 |          4        0.04       97.81
          9 |        219        2.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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