Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        218        2.18        2.18
           |          1        0.01        2.19
          0 |        892        8.92       11.11
          1 |        876        8.76       19.87
          2 |        641        6.41       26.28
          3 |        407        4.07       30.35
          4 |        454        4.54       34.89
          5 |        478        4.78       39.67
          6 |        415        4.15       43.82
          7 |        387        3.87       47.69
          8 |        373        3.73       51.42
          9 |      1,507       15.07       66.49
          A |        164        1.64       68.13
          B |        122        1.22       69.35
          C |        251        2.51       71.86
          D |        139        1.39       73.25
          E |        104        1.04       74.29
          F |        128        1.28       75.57
          G |        145        1.45       77.02
          H |        163        1.63       78.65
          I |          2        0.02       78.67
          J |         57        0.57       79.24
          K |         68        0.68       79.92
          L |        308        3.08       83.00
          M |        114        1.14       84.14
          N |        105        1.05       85.19
          O |          2        0.02       85.21
          P |        120        1.20       86.41
          Q |         79        0.79       87.20
          R |        154        1.54       88.74
          S |        182        1.82       90.56
          T |         37        0.37       90.93
          U |        154        1.54       92.47
          V |         71        0.71       93.18
          W |         78        0.78       93.96
          X |         93        0.93       94.89
          Y |         58        0.58       95.47
          Z |        453        4.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016