Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         15        0.15        0.15
          0 |        424        4.24        4.39
          1 |      1,199       11.99       16.38
          2 |      1,415       14.15       30.53
          3 |        825        8.25       38.78
          4 |      1,416       14.16       52.94
          5 |        821        8.21       61.15
          6 |        928        9.28       70.43
          7 |        444        4.44       74.87
          8 |        542        5.42       80.29
          9 |      1,036       10.36       90.65
          A |         65        0.65       91.30
          B |         42        0.42       91.72
          C |         62        0.62       92.34
          D |         35        0.35       92.69
          E |         93        0.93       93.62
          F |         19        0.19       93.81
          G |         21        0.21       94.02
          H |         34        0.34       94.36
          J |         35        0.35       94.71
          K |         15        0.15       94.86
          L |         87        0.87       95.73
          M |         34        0.34       96.07
          N |          6        0.06       96.13
          P |         29        0.29       96.42
          Q |          3        0.03       96.45
          R |         45        0.45       96.90
          S |         41        0.41       97.31
          T |         11        0.11       97.42
          U |         13        0.13       97.55
          V |         28        0.28       97.83
          W |         17        0.17       98.00
          X |         26        0.26       98.26
          Y |        105        1.05       99.31
          Z |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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