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

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         22        0.22        0.22
          0 |        169        1.69        1.91
          1 |      1,660       16.60       18.51
          2 |        739        7.39       25.90
          3 |        645        6.45       32.35
          4 |        603        6.03       38.38
          5 |        231        2.31       40.69
          6 |        385        3.85       44.54
          7 |        141        1.41       45.95
          8 |        173        1.73       47.68
          9 |      1,623       16.23       63.91
          A |        161        1.61       65.52
          B |        128        1.28       66.80
          C |        909        9.09       75.89
          D |        125        1.25       77.14
          E |         97        0.97       78.11
          F |        527        5.27       83.38
          G |        128        1.28       84.66
          H |        143        1.43       86.09
          I |          2        0.02       86.11
          J |         98        0.98       87.09
          K |         71        0.71       87.80
          L |        105        1.05       88.85
          M |         24        0.24       89.09
          N |         11        0.11       89.20
          O |         14        0.14       89.34
          P |        215        2.15       91.49
          R |        222        2.22       93.71
          S |        136        1.36       95.07
          T |        208        2.08       97.15
          U |         21        0.21       97.36
          V |         88        0.88       98.24
          W |         97        0.97       99.21
          X |         34        0.34       99.55
          Y |          9        0.09       99.64
          Z |         36        0.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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