Frequencies for l_state variable in vehicle dataset :

    LICENSE |
      STATE |      Freq.     Percent        Cum.
------------+-----------------------------------
          6 |          1        0.21        0.21
          9 |          1        0.21        0.42
         12 |          5        1.06        1.48
         13 |          1        0.21        1.69
         36 |          2        0.42        2.12
         43 |        432       91.53       93.64
         97 |          1        0.21       93.86
         99 |         29        6.14      100.00
------------+-----------------------------------
      Total |        472      100.00

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