Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        257        2.57        2.57
          0 |      1,931       19.31       21.88
          1 |        815        8.15       30.03
          2 |        509        5.09       35.12
          3 |        292        2.92       38.04
          4 |        343        3.43       41.47
          5 |        345        3.45       44.92
          6 |        292        2.92       47.84
          7 |        223        2.23       50.07
          8 |        300        3.00       53.07
          9 |      1,690       16.90       69.97
          A |        155        1.55       71.52
          B |        129        1.29       72.81
          C |        232        2.32       75.13
          D |        151        1.51       76.64
          E |        110        1.10       77.74
          F |        116        1.16       78.90
          G |        139        1.39       80.29
          H |        162        1.62       81.91
          I |          3        0.03       81.94
          J |         49        0.49       82.43
          K |         45        0.45       82.88
          L |        290        2.90       85.78
          M |         95        0.95       86.73
          N |        111        1.11       87.84
          O |          7        0.07       87.91
          P |        103        1.03       88.94
          Q |         60        0.60       89.54
          R |        123        1.23       90.77
          S |        156        1.56       92.33
          T |         52        0.52       92.85
          U |        116        1.16       94.01
          V |         69        0.69       94.70
          W |         78        0.78       95.48
          X |         71        0.71       96.19
          Y |         57        0.57       96.76
          Z |        324        3.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016