Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,344       23.44       23.44
          0 |          8        0.08       23.52
          2 |          1        0.01       23.53
          3 |          1        0.01       23.54
          7 |          2        0.02       23.56
          9 |        345        3.45       27.01
          A |          4        0.04       27.05
          B |        326        3.26       30.31
          C |        371        3.71       34.02
          D |        405        4.05       38.07
          E |        578        5.78       43.85
          F |        562        5.62       49.47
          G |        646        6.46       55.93
          H |        634        6.34       62.27
          J |        670        6.70       68.97
          K |        705        7.05       76.02
          L |        614        6.14       82.16
          M |        606        6.06       88.22
          N |        584        5.84       94.06
          P |        558        5.58       99.64
          R |         35        0.35       99.99
          X |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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