Frequencies for l_restri variable in vehicle dataset :

 COMPLIANCE |
      W/LIC |
RESTRICTION |
          S |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        566       90.42       90.42
          1 |          1        0.16       90.58
          9 |         58        9.27       99.84
          . |          1        0.16      100.00
------------+-----------------------------------
      Total |        626      100.00

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