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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         50        0.50        0.50
          1 |        233        2.33        2.83
          2 |         39        0.39        3.22
          3 |         27        0.27        3.49
          4 |         35        0.35        3.84
          5 |         85        0.85        4.69
          6 |         22        0.22        4.91
          7 |         23        0.23        5.14
          8 |         17        0.17        5.31
          9 |        431        4.31        9.62
          A |        538        5.38       15.00
          B |        563        5.63       20.63
          C |      1,000       10.00       30.63
          D |        695        6.95       37.58
          E |      1,094       10.94       48.52
          F |        696        6.96       55.48
          G |        527        5.27       60.75
          H |        527        5.27       66.02
          J |        328        3.28       69.30
          K |        155        1.55       70.85
          L |        303        3.03       73.88
          M |        146        1.46       75.34
          N |        302        3.02       78.36
          O |          3        0.03       78.39
          P |        255        2.55       80.94
          Q |          1        0.01       80.95
          R |        381        3.81       84.76
          S |        349        3.49       88.25
          T |         63        0.63       88.88
          U |         30        0.30       89.18
          V |        150        1.50       90.68
          W |        297        2.97       93.65
          X |         45        0.45       94.10
          Y |        264        2.64       96.74
          Z |        326        3.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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