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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          2        0.02        0.02
          - |          1        0.01        0.03
          0 |         48        0.48        0.51
          1 |        222        2.22        2.73
          2 |         39        0.39        3.12
          3 |         47        0.47        3.59
          4 |         36        0.36        3.95
          5 |         89        0.89        4.84
          6 |         18        0.18        5.02
          7 |         49        0.49        5.51
          8 |         12        0.12        5.63
          9 |        430        4.30        9.93
          A |        538        5.38       15.31
          B |        623        6.23       21.54
          C |        977        9.77       31.31
          D |        670        6.70       38.01
          E |      1,074       10.74       48.75
          F |        683        6.83       55.58
          G |        529        5.29       60.87
          H |        547        5.47       66.34
          J |        277        2.77       69.11
          K |        173        1.73       70.84
          L |        302        3.02       73.86
          M |        104        1.04       74.90
          N |        270        2.70       77.60
          P |        199        1.99       79.59
          R |        401        4.01       83.60
          S |        401        4.01       87.61
          T |         71        0.71       88.32
          U |         52        0.52       88.84
          V |        185        1.85       90.69
          W |        292        2.92       93.61
          X |         84        0.84       94.45
          Y |        275        2.75       97.20
          Z |        280        2.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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