Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         44        0.44        0.44
          1 |      4,750       47.50       47.94
          2 |        670        6.70       54.64
          3 |        221        2.21       56.85
          4 |        245        2.45       59.30
          5 |         43        0.43       59.73
          6 |         75        0.75       60.48
          7 |         37        0.37       60.85
          8 |         50        0.50       61.35
          9 |        440        4.40       65.75
          A |         22        0.22       65.97
          B |         38        0.38       66.35
          C |        284        2.84       69.19
          D |         38        0.38       69.57
          E |         57        0.57       70.14
          F |        153        1.53       71.67
          G |         22        0.22       71.89
          H |         61        0.61       72.50
          I |          2        0.02       72.52
          J |      2,086       20.86       93.38
          K |        147        1.47       94.85
          L |         13        0.13       94.98
          M |         11        0.11       95.09
          N |         14        0.14       95.23
          O |          4        0.04       95.27
          P |         26        0.26       95.53
          R |         81        0.81       96.34
          S |         62        0.62       96.96
          T |         82        0.82       97.78
          U |         17        0.17       97.95
          V |         31        0.31       98.26
          W |        131        1.31       99.57
          X |          8        0.08       99.65
          Y |         28        0.28       99.93
          Z |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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