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

      state |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,520       15.20       15.20
          2 |        104        1.04       16.24
          4 |      1,410       14.10       30.34
          5 |        784        7.84       38.18
          6 |      4,626       46.26       84.44
          8 |        843        8.43       92.87
          9 |        400        4.00       96.87
         10 |        153        1.53       98.40
         11 |         60        0.60       99.00
         12 |        100        1.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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