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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        254        2.54        2.54
          1 |        665        6.65        9.19
          2 |        533        5.33       14.52
          3 |        333        3.33       17.85
          4 |        268        2.68       20.53
          5 |        229        2.29       22.82
          6 |        129        1.29       24.11
          7 |        583        5.83       29.94
          8 |        157        1.57       31.51
          9 |        770        7.70       39.21
          A |        869        8.69       47.90
          B |      1,144       11.44       59.34
          C |        516        5.16       64.50
          D |        266        2.66       67.16
          E |        303        3.03       70.19
          F |        306        3.06       73.25
          G |        289        2.89       76.14
          H |        315        3.15       79.29
          J |        141        1.41       80.70
          K |         85        0.85       81.55
          L |        171        1.71       83.26
          M |        129        1.29       84.55
          N |        194        1.94       86.49
          P |        287        2.87       89.36
          Q |          1        0.01       89.37
          R |        420        4.20       93.57
          S |        184        1.84       95.41
          T |         77        0.77       96.18
          U |         60        0.60       96.78
          V |         27        0.27       97.05
          W |         59        0.59       97.64
          X |         17        0.17       97.81
          Y |        156        1.56       99.37
          Z |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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