Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        132        1.32        1.32
          1 |        387        3.87        5.19
          2 |        260        2.60        7.79
          3 |        197        1.97        9.76
          4 |        166        1.66       11.42
          5 |        133        1.33       12.75
          6 |         80        0.80       13.55
          7 |        320        3.20       16.75
          8 |         83        0.83       17.58
          9 |        593        5.93       23.51
          A |        943        9.43       32.94
          B |        955        9.55       42.49
          C |        895        8.95       51.44
          D |        450        4.50       55.94
          E |        561        5.61       61.55
          F |        455        4.55       66.10
          G |        359        3.59       69.69
          H |        427        4.27       73.96
          J |        220        2.20       76.16
          K |        100        1.00       77.16
          L |        235        2.35       79.51
          M |        155        1.55       81.06
          N |        215        2.15       83.21
          P |        366        3.66       86.87
          Q |          1        0.01       86.88
          R |        353        3.53       90.41
          S |        277        2.77       93.18
          T |         53        0.53       93.71
          U |         44        0.44       94.15
          V |        130        1.30       95.45
          W |        156        1.56       97.01
          X |         73        0.73       97.74
          Y |        162        1.62       99.36
          Z |         64        0.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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