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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         54        0.54        0.54
          1 |        331        3.31        3.85
          2 |        153        1.53        5.38
          3 |         89        0.89        6.27
          4 |         36        0.36        6.63
          5 |         42        0.42        7.05
          6 |         54        0.54        7.59
          7 |         60        0.60        8.19
          8 |         71        0.71        8.90
          9 |        433        4.33       13.23
          A |        268        2.68       15.91
          B |        434        4.34       20.25
          C |        278        2.78       23.03
          D |        103        1.03       24.06
          E |        120        1.20       25.26
          F |      1,269       12.69       37.95
          G |      1,843       18.43       56.38
          H |        728        7.28       63.66
          J |        182        1.82       65.48
          K |        233        2.33       67.81
          L |        257        2.57       70.38
          M |        540        5.40       75.78
          N |        600        6.00       81.78
          O |          1        0.01       81.79
          P |        176        1.76       83.55
          Q |         40        0.40       83.95
          R |        109        1.09       85.04
          S |        203        2.03       87.07
          T |        706        7.06       94.13
          U |         13        0.13       94.26
          V |        122        1.22       95.48
          W |         72        0.72       96.20
          X |        155        1.55       97.75
          Y |        142        1.42       99.17
          Z |         83        0.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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