Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        0.12        0.12
          1 |         18        0.18        0.30
          2 |         15        0.15        0.45
          3 |          5        0.05        0.50
          4 |          5        0.05        0.55
          5 |         10        0.10        0.65
          6 |          6        0.06        0.71
          7 |          9        0.09        0.80
          8 |          8        0.08        0.88
          9 |        346        3.46        4.34
          A |        201        2.01        6.35
          B |        466        4.66       11.01
          C |        179        1.79       12.80
          D |        255        2.55       15.35
          E |         12        0.12       15.47
          F |      1,704       17.04       32.51
          G |      2,087       20.87       53.38
          H |      1,262       12.62       66.00
          J |        247        2.47       68.47
          K |        115        1.15       69.62
          L |         93        0.93       70.55
          M |        365        3.65       74.20
          N |        732        7.32       81.52
          P |         57        0.57       82.09
          R |         13        0.13       82.22
          S |        298        2.98       85.20
          T |        821        8.21       93.41
          U |         23        0.23       93.64
          V |        176        1.76       95.40
          W |         11        0.11       95.51
          X |        171        1.71       97.22
          Y |        239        2.39       99.61
          Z |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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