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

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         39        0.39        0.39
          1 |      4,935       49.35       49.74
          2 |        785        7.85       57.59
          3 |        200        2.00       59.59
          4 |        249        2.49       62.08
          5 |         24        0.24       62.32
          6 |         48        0.48       62.80
          7 |         33        0.33       63.13
          8 |         31        0.31       63.44
          9 |        442        4.42       67.86
          A |         17        0.17       68.03
          B |         29        0.29       68.32
          C |        238        2.38       70.70
          D |         23        0.23       70.93
          E |         44        0.44       71.37
          F |        142        1.42       72.79
          G |         24        0.24       73.03
          H |         51        0.51       73.54
          J |      1,992       19.92       93.46
          K |        130        1.30       94.76
          L |         12        0.12       94.88
          M |          9        0.09       94.97
          N |          8        0.08       95.05
          P |         20        0.20       95.25
          R |         69        0.69       95.94
          S |         59        0.59       96.53
          T |         85        0.85       97.38
          U |         19        0.19       97.57
          V |         25        0.25       97.82
          W |        160        1.60       99.42
          X |          5        0.05       99.47
          Y |         43        0.43       99.90
          Z |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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