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

 Compliance |
   with CDL |
endorsement |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         -1 |         15        0.15        0.15
          0 |      9,410       94.10       94.25
          1 |        181        1.81       96.06
          2 |          3        0.03       96.09
          3 |         71        0.71       96.80
          8 |          3        0.03       96.83
          9 |        270        2.70       99.53
          . |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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