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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         63        0.63        0.63
          1 |      1,050       10.50       11.13
          2 |        747        7.47       18.60
          3 |        757        7.57       26.17
          4 |        911        9.11       35.28
          5 |         57        0.57       35.85
          6 |        270        2.70       38.55
          7 |        264        2.64       41.19
          8 |        203        2.03       43.22
          9 |        422        4.22       47.44
          A |        919        9.19       56.63
          B |        175        1.75       58.38
          C |        541        5.41       63.79
          D |        262        2.62       66.41
          E |        149        1.49       67.90
          F |         44        0.44       68.34
          G |        359        3.59       71.93
          H |         78        0.78       72.71
          J |         26        0.26       72.97
          K |        195        1.95       74.92
          L |         76        0.76       75.68
          M |        632        6.32       82.00
          N |        332        3.32       85.32
          P |         93        0.93       86.25
          Q |          1        0.01       86.26
          R |         12        0.12       86.38
          S |        103        1.03       87.41
          T |        760        7.60       95.01
          U |        214        2.14       97.15
          V |         81        0.81       97.96
          W |         76        0.76       98.72
          X |         84        0.84       99.56
          Y |         28        0.28       99.84
          Z |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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