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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        174        1.74        1.74
          1 |      1,270       12.70       14.44
          2 |        901        9.01       23.45
          3 |        866        8.66       32.11
          4 |        999        9.99       42.10
          5 |        169        1.69       43.79
          6 |        415        4.15       47.94
          7 |        218        2.18       50.12
          8 |        228        2.28       52.40
          9 |        434        4.34       56.74
          A |        808        8.08       64.82
          B |        143        1.43       66.25
          C |        494        4.94       71.19
          D |        215        2.15       73.34
          E |        161        1.61       74.95
          F |         34        0.34       75.29
          G |        162        1.62       76.91
          H |         91        0.91       77.82
          I |          1        0.01       77.83
          J |         22        0.22       78.05
          K |        105        1.05       79.10
          L |         95        0.95       80.05
          M |        505        5.05       85.10
          N |        197        1.97       87.07
          P |         87        0.87       87.94
          Q |          7        0.07       88.01
          R |         25        0.25       88.26
          S |        104        1.04       89.30
          T |        672        6.72       96.02
          U |        186        1.86       97.88
          V |         56        0.56       98.44
          W |         67        0.67       99.11
          X |         43        0.43       99.54
          Y |         41        0.41       99.95
          Z |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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