Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |         47        0.47        0.48
          1 |        211        2.11        2.59
          2 |         61        0.61        3.20
          3 |         48        0.48        3.68
          4 |         64        0.64        4.32
          5 |         95        0.95        5.27
          6 |         35        0.35        5.62
          7 |         39        0.39        6.01
          8 |         18        0.18        6.19
          9 |        419        4.19       10.38
          A |        592        5.92       16.30
          B |        609        6.09       22.39
          C |      1,031       10.31       32.70
          D |        653        6.53       39.23
          E |      1,041       10.41       49.64
          F |        617        6.17       55.81
          G |        539        5.39       61.20
          H |        561        5.61       66.81
          J |        280        2.80       69.61
          K |        163        1.63       71.24
          L |        312        3.12       74.36
          M |        156        1.56       75.92
          N |        272        2.72       78.64
          P |        253        2.53       81.17
          R |        414        4.14       85.31
          S |        318        3.18       88.49
          T |         68        0.68       89.17
          U |         43        0.43       89.60
          V |        146        1.46       91.06
          W |        310        3.10       94.16
          X |         79        0.79       94.95
          Y |        254        2.54       97.49
          Z |        251        2.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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