Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         23        0.23        0.23
          1 |         70        0.70        0.93
          2 |         37        0.37        1.30
          3 |         16        0.16        1.46
          4 |          6        0.06        1.52
          5 |         10        0.10        1.62
          6 |         13        0.13        1.75
          7 |         14        0.14        1.89
          8 |         21        0.21        2.10
          9 |        415        4.15        6.25
          A |        189        1.89        8.14
          B |        673        6.73       14.87
          C |        192        1.92       16.79
          D |         73        0.73       17.52
          E |         29        0.29       17.81
          F |      1,874       18.74       36.55
          G |      2,298       22.98       59.53
          H |      1,071       10.71       70.24
          I |          1        0.01       70.25
          J |        204        2.04       72.29
          K |         83        0.83       73.12
          L |         88        0.88       74.00
          M |        389        3.89       77.89
          N |        616        6.16       84.05
          P |        126        1.26       85.31
          Q |          3        0.03       85.34
          R |         20        0.20       85.54
          S |        186        1.86       87.40
          T |        772        7.72       95.12
          U |         10        0.10       95.22
          V |        155        1.55       96.77
          W |         17        0.17       96.94
          X |        171        1.71       98.65
          Y |        115        1.15       99.80
          Z |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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