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

      state |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,142       11.42       11.42
          2 |         89        0.89       12.31
          4 |      1,006       10.06       22.37
          5 |        783        7.83       30.20
          6 |      4,219       42.19       72.39
          8 |        655        6.55       78.94
          9 |        302        3.02       81.96
         10 |        154        1.54       83.50
         11 |         37        0.37       83.87
         12 |      1,613       16.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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