Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         23        0.23        0.23
          0 |        867        8.67        8.90
          1 |        877        8.77       17.67
          2 |      1,003       10.03       27.70
          3 |        646        6.46       34.16
          4 |      1,231       12.31       46.47
          5 |        819        8.19       54.66
          6 |        823        8.23       62.89
          7 |        405        4.05       66.94
          8 |        456        4.56       71.50
          9 |      1,786       17.86       89.36
          A |         97        0.97       90.33
          B |         50        0.50       90.83
          C |         48        0.48       91.31
          D |         17        0.17       91.48
          E |        134        1.34       92.82
          F |        141        1.41       94.23
          G |         23        0.23       94.46
          H |         20        0.20       94.66
          J |          8        0.08       94.74
          K |         20        0.20       94.94
          L |         77        0.77       95.71
          M |         10        0.10       95.81
          N |         35        0.35       96.16
          O |         22        0.22       96.38
          P |         12        0.12       96.50
          Q |         11        0.11       96.61
          R |          9        0.09       96.70
          S |         54        0.54       97.24
          T |         41        0.41       97.65
          U |         11        0.11       97.76
          V |         45        0.45       98.21
          X |         12        0.12       98.33
          Y |        141        1.41       99.74
          Z |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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