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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        158        1.58        1.58
          0 |        890        8.90       10.48
          1 |        869        8.69       19.17
          2 |        622        6.22       25.39
          3 |        492        4.92       30.31
          4 |        510        5.10       35.41
          5 |        502        5.02       40.43
          6 |        406        4.06       44.49
          7 |        427        4.27       48.76
          8 |        423        4.23       52.99
          9 |      1,076       10.76       63.75
          A |        201        2.01       65.76
          B |        150        1.50       67.26
          C |        301        3.01       70.27
          D |        150        1.50       71.77
          E |        125        1.25       73.02
          F |        123        1.23       74.25
          G |        161        1.61       75.86
          H |        139        1.39       77.25
          I |          3        0.03       77.28
          J |         93        0.93       78.21
          K |         72        0.72       78.93
          L |        317        3.17       82.10
          M |        107        1.07       83.17
          N |        108        1.08       84.25
          P |        135        1.35       85.60
          Q |         78        0.78       86.38
          R |        196        1.96       88.34
          S |        218        2.18       90.52
          T |         29        0.29       90.81
          U |        118        1.18       91.99
          V |         64        0.64       92.63
          W |         88        0.88       93.51
          X |        121        1.21       94.72
          Y |         69        0.69       95.41
          Z |        459        4.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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