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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         73        0.73        0.73
          1 |        241        2.41        3.14
          2 |         84        0.84        3.98
          3 |         57        0.57        4.55
          4 |         64        0.64        5.19
          5 |         94        0.94        6.13
          6 |         41        0.41        6.54
          7 |         70        0.70        7.24
          8 |         36        0.36        7.60
          9 |        405        4.05       11.65
          A |        668        6.68       18.33
          B |        694        6.94       25.27
          C |      1,053       10.53       35.80
          D |        669        6.69       42.49
          E |        896        8.96       51.45
          F |        591        5.91       57.36
          G |        462        4.62       61.98
          H |        570        5.70       67.68
          J |        263        2.63       70.31
          K |        178        1.78       72.09
          L |        353        3.53       75.62
          M |        137        1.37       76.99
          N |        244        2.44       79.43
          P |        305        3.05       82.48
          Q |          2        0.02       82.50
          R |        306        3.06       85.56
          S |        335        3.35       88.91
          T |         64        0.64       89.55
          U |         54        0.54       90.09
          V |        167        1.67       91.76
          W |        286        2.86       94.62
          X |         82        0.82       95.44
          Y |        232        2.32       97.76
          Z |        224        2.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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