Frequencies for first 10,000 rows of vin_11 variable in vehicle dataset :

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        156        1.56        1.56
          0 |        607        6.07        7.63
          1 |        391        3.91       11.54
          2 |        295        2.95       14.49
          3 |        139        1.39       15.88
          4 |        233        2.33       18.21
          5 |        238        2.38       20.59
          6 |        270        2.70       23.29
          7 |        290        2.90       26.19
          8 |        258        2.58       28.77
          9 |        518        5.18       33.95
          A |        367        3.67       37.62
          B |        210        2.10       39.72
          C |        604        6.04       45.76
          D |        186        1.86       47.62
          E |        231        2.31       49.93
          F |        286        2.86       52.79
          G |        176        1.76       54.55
          H |        509        5.09       59.64
          J |        191        1.91       61.55
          K |        293        2.93       64.48
          L |        282        2.82       67.30
          M |        248        2.48       69.78
          N |        210        2.10       71.88
          P |        315        3.15       75.03
          R |        201        2.01       77.04
          S |        333        3.33       80.37
          T |        196        1.96       82.33
          U |        487        4.87       87.20
          V |         77        0.77       87.97
          W |        291        2.91       90.88
          X |        205        2.05       92.93
          Y |        252        2.52       95.45
          Z |        455        4.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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