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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         41        0.41        0.41
          0 |         26        0.26        0.67
          1 |        696        6.96        7.63
          2 |        596        5.96       13.59
          3 |        670        6.70       20.29
          4 |        665        6.65       26.94
          5 |        727        7.27       34.21
          6 |        667        6.67       40.88
          7 |        107        1.07       41.95
          8 |         17        0.17       42.12
          9 |        425        4.25       46.37
          A |          3        0.03       46.40
          B |         20        0.20       46.60
          C |         36        0.36       46.96
          D |         32        0.32       47.28
          E |         56        0.56       47.84
          F |         72        0.72       48.56
          G |        107        1.07       49.63
          H |        130        1.30       50.93
          J |        176        1.76       52.69
          K |        188        1.88       54.57
          L |        244        2.44       57.01
          M |        249        2.49       59.50
          N |        250        2.50       62.00
          P |        310        3.10       65.10
          R |        370        3.70       68.80
          S |        460        4.60       73.40
          T |        412        4.12       77.52
          V |        523        5.23       82.75
          W |        497        4.97       87.72
          X |        566        5.66       93.38
          Y |        662        6.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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