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

    LICENCE |
ENDORSEMENT |
          S |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,214       92.14       92.14
          1 |        222        2.22       94.36
          3 |         24        0.24       94.60
          9 |        540        5.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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