Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         77        0.77        0.77
          1 |      1,071       10.71       11.48
          2 |        804        8.04       19.52
          3 |        812        8.12       27.64
          4 |        920        9.20       36.84
          5 |         57        0.57       37.41
          6 |        291        2.91       40.32
          7 |        281        2.81       43.13
          8 |        233        2.33       45.46
          9 |        385        3.85       49.31
          A |        836        8.36       57.67
          B |        155        1.55       59.22
          C |        502        5.02       64.24
          D |        308        3.08       67.32
          E |        157        1.57       68.89
          F |         52        0.52       69.41
          G |        305        3.05       72.46
          H |         92        0.92       73.38
          I |          1        0.01       73.39
          J |         21        0.21       73.60
          K |        156        1.56       75.16
          L |         66        0.66       75.82
          M |        638        6.38       82.20
          N |        285        2.85       85.05
          P |        106        1.06       86.11
          R |         14        0.14       86.25
          S |         90        0.90       87.15
          T |        791        7.91       95.06
          U |        217        2.17       97.23
          V |         75        0.75       97.98
          W |         87        0.87       98.85
          X |         83        0.83       99.68
          Y |         24        0.24       99.92
          Z |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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