Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         14        0.14        0.14
          1 |      5,137       51.37       51.51
          2 |        975        9.75       61.26
          3 |        443        4.43       65.69
          4 |        493        4.93       70.62
          5 |        269        2.69       73.31
          6 |         15        0.15       73.46
          8 |          5        0.05       73.51
          9 |        340        3.40       76.91
          A |          8        0.08       76.99
          B |          1        0.01       77.00
          C |         33        0.33       77.33
          D |          1        0.01       77.34
          E |          3        0.03       77.37
          F |         14        0.14       77.51
          G |          3        0.03       77.54
          H |          7        0.07       77.61
          J |      1,702       17.02       94.63
          K |        198        1.98       96.61
          L |          3        0.03       96.64
          M |          2        0.02       96.66
          N |          1        0.01       96.67
          P |          2        0.02       96.69
          R |          5        0.05       96.74
          S |         41        0.41       97.15
          T |          7        0.07       97.22
          V |          9        0.09       97.31
          W |        217        2.17       99.48
          X |          1        0.01       99.49
          Y |         41        0.41       99.90
          Z |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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