Frequencies for l_endors variable in vehicle dataset :

    LICENCE |
ENDORSEMENT |
          S |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        592       94.12       94.12
          9 |         37        5.88      100.00
------------+-----------------------------------
      Total |        629      100.00

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