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

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          6        0.06        0.06
          1 |      5,178       51.78       51.84
          2 |        914        9.14       60.98
          3 |        413        4.13       65.11
          4 |        478        4.78       69.89
          5 |        239        2.39       72.28
          6 |         13        0.13       72.41
          7 |          4        0.04       72.45
          8 |          5        0.05       72.50
          9 |        423        4.23       76.73
          A |          6        0.06       76.79
          B |          5        0.05       76.84
          C |         31        0.31       77.15
          D |          9        0.09       77.24
          E |          1        0.01       77.25
          F |         22        0.22       77.47
          G |          2        0.02       77.49
          H |          6        0.06       77.55
          J |      1,706       17.06       94.61
          K |        185        1.85       96.46
          L |          5        0.05       96.51
          P |          1        0.01       96.52
          R |          7        0.07       96.59
          S |         38        0.38       96.97
          T |          8        0.08       97.05
          U |          4        0.04       97.09
          V |          6        0.06       97.15
          W |        201        2.01       99.16
          X |          2        0.02       99.18
          Y |         61        0.61       99.79
          Z |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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