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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         48        0.48        0.48
          0 |        861        8.61        9.09
          1 |        808        8.08       17.17
          2 |        974        9.74       26.91
          3 |        634        6.34       33.25
          4 |      1,175       11.75       45.00
          5 |        804        8.04       53.04
          6 |        826        8.26       61.30
          7 |        433        4.33       65.63
          8 |        517        5.17       70.80
          9 |      1,766       17.66       88.46
          A |        100        1.00       89.46
          B |         72        0.72       90.18
          C |         41        0.41       90.59
          D |         26        0.26       90.85
          E |        128        1.28       92.13
          F |        121        1.21       93.34
          G |         15        0.15       93.49
          H |         19        0.19       93.68
          J |          8        0.08       93.76
          K |         23        0.23       93.99
          L |        138        1.38       95.37
          M |         10        0.10       95.47
          N |         45        0.45       95.92
          O |          9        0.09       96.01
          P |          4        0.04       96.05
          Q |         12        0.12       96.17
          R |         24        0.24       96.41
          S |         76        0.76       97.17
          T |         45        0.45       97.62
          U |         17        0.17       97.79
          V |         46        0.46       98.25
          W |          3        0.03       98.28
          X |          8        0.08       98.36
          Y |        132        1.32       99.68
          Z |         30        0.30       99.98
          _ |          1        0.01       99.99
          } |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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