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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,623       26.23       26.23
          0 |         14        0.14       26.37
          4 |          1        0.01       26.38
          8 |          1        0.01       26.39
          9 |        333        3.33       29.72
          A |          4        0.04       29.76
          B |        370        3.70       33.46
          C |        381        3.81       37.27
          D |        411        4.11       41.38
          E |        600        6.00       47.38
          F |        654        6.54       53.92
          G |        727        7.27       61.19
          H |        643        6.43       67.62
          J |        684        6.84       74.46
          K |        690        6.90       81.36
          L |        630        6.30       87.66
          M |        683        6.83       94.49
          N |        511        5.11       99.60
          P |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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