Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         86        0.86        0.86
          0 |         71        0.71        1.57
          1 |        132        1.32        2.89
          2 |         55        0.55        3.44
          3 |         51        0.51        3.95
          4 |         46        0.46        4.41
          5 |         68        0.68        5.09
          6 |         54        0.54        5.63
          7 |         61        0.61        6.24
          8 |         42        0.42        6.66
          9 |        408        4.08       10.74
          A |          1        0.01       10.75
          B |         96        0.96       11.71
          C |        125        1.25       12.96
          D |        144        1.44       14.40
          E |        214        2.14       16.54
          F |        271        2.71       19.25
          G |        349        3.49       22.74
          H |        397        3.97       26.71
          J |        395        3.95       30.66
          K |        479        4.79       35.45
          L |        454        4.54       39.99
          M |        500        5.00       44.99
          N |        471        4.71       49.70
          P |        529        5.29       54.99
          R |        615        6.15       61.14
          S |        687        6.87       68.01
          T |        535        5.35       73.36
          V |        640        6.40       79.76
          W |        609        6.09       85.85
          X |        739        7.39       93.24
          Y |        676        6.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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