Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          7        0.07        0.07
          0 |        227        2.27        2.34
          1 |      1,344       13.44       15.78
          2 |        959        9.59       25.37
          3 |        888        8.88       34.25
          4 |      1,053       10.53       44.78
          5 |        196        1.96       46.74
          6 |        458        4.58       51.32
          7 |        215        2.15       53.47
          8 |        273        2.73       56.20
          9 |        429        4.29       60.49
          A |        736        7.36       67.85
          B |        127        1.27       69.12
          C |        445        4.45       73.57
          D |        196        1.96       75.53
          E |        176        1.76       77.29
          F |         53        0.53       77.82
          G |        111        1.11       78.93
          H |         92        0.92       79.85
          J |         24        0.24       80.09
          K |        120        1.20       81.29
          L |        122        1.22       82.51
          M |        412        4.12       86.63
          N |        174        1.74       88.37
          P |         78        0.78       89.15
          Q |          2        0.02       89.17
          R |         19        0.19       89.36
          S |        119        1.19       90.55
          T |        586        5.86       96.41
          U |        159        1.59       98.00
          V |         53        0.53       98.53
          W |         49        0.49       99.02
          X |         44        0.44       99.46
          Y |         47        0.47       99.93
          Z |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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