Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         63        0.63        0.63
          1 |      4,208       42.08       42.71
          2 |        503        5.03       47.74
          3 |        241        2.41       50.15
          4 |        190        1.90       52.05
          5 |         56        0.56       52.61
          6 |        113        1.13       53.74
          7 |         61        0.61       54.35
          8 |         57        0.57       54.92
          9 |        504        5.04       59.96
          A |         43        0.43       60.39
          B |         55        0.55       60.94
          C |        354        3.54       64.48
          D |         34        0.34       64.82
          E |         54        0.54       65.36
          F |        206        2.06       67.42
          G |         49        0.49       67.91
          H |         93        0.93       68.84
          I |          1        0.01       68.85
          J |      2,192       21.92       90.77
          K |        166        1.66       92.43
          L |         18        0.18       92.61
          M |         20        0.20       92.81
          N |         21        0.21       93.02
          O |          1        0.01       93.03
          P |         35        0.35       93.38
          R |        151        1.51       94.89
          S |        103        1.03       95.92
          T |        103        1.03       96.95
          U |         19        0.19       97.14
          V |         45        0.45       97.59
          W |        176        1.76       99.35
          X |         10        0.10       99.45
          Y |         45        0.45       99.90
          Z |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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