Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        472        4.72        4.73
          1 |      1,063       10.63       15.36
          2 |        933        9.33       24.69
          3 |        647        6.47       31.16
          4 |        462        4.62       35.78
          5 |        457        4.57       40.35
          6 |        277        2.77       43.12
          7 |        934        9.34       52.46
          8 |        278        2.78       55.24
          9 |      1,171       11.71       66.95
          A |        699        6.99       73.94
          B |        554        5.54       79.48
          C |        255        2.55       82.03
          D |        127        1.27       83.30
          E |        129        1.29       84.59
          F |         84        0.84       85.43
          G |        176        1.76       87.19
          H |        192        1.92       89.11
          J |         67        0.67       89.78
          K |         87        0.87       90.65
          L |         59        0.59       91.24
          M |         86        0.86       92.10
          N |         47        0.47       92.57
          P |        110        1.10       93.67
          Q |          5        0.05       93.72
          R |        230        2.30       96.02
          S |        136        1.36       97.38
          T |         52        0.52       97.90
          U |         38        0.38       98.28
          V |          9        0.09       98.37
          W |         22        0.22       98.59
          X |          4        0.04       98.63
          Y |        115        1.15       99.78
          Z |         21        0.21       99.99
          ~ |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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