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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        281        2.81        2.81
          0 |      1,602       16.02       18.83
          1 |        773        7.73       26.56
          2 |        513        5.13       31.69
          3 |        377        3.77       35.46
          4 |        361        3.61       39.07
          5 |        424        4.24       43.31
          6 |        335        3.35       46.66
          7 |        283        2.83       49.49
          8 |        311        3.11       52.60
          9 |      1,735       17.35       69.95
          A |        154        1.54       71.49
          B |        120        1.20       72.69
          C |        234        2.34       75.03
          D |        147        1.47       76.50
          E |         92        0.92       77.42
          F |         97        0.97       78.39
          G |        135        1.35       79.74
          H |        127        1.27       81.01
          I |          2        0.02       81.03
          J |         62        0.62       81.65
          K |         59        0.59       82.24
          L |        287        2.87       85.11
          M |        102        1.02       86.13
          N |         90        0.90       87.03
          O |          4        0.04       87.07
          P |         71        0.71       87.78
          Q |         48        0.48       88.26
          R |        143        1.43       89.69
          S |        188        1.88       91.57
          T |         28        0.28       91.85
          U |        158        1.58       93.43
          V |         75        0.75       94.18
          W |         66        0.66       94.84
          X |         87        0.87       95.71
          Y |         41        0.41       96.12
          Z |        388        3.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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