Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        370        3.70        3.70
          ( |          1        0.01        3.71
          - |          3        0.03        3.74
          0 |      1,831       18.31       22.05
          1 |        871        8.71       30.76
          2 |        523        5.23       35.99
          3 |        378        3.78       39.77
          4 |        385        3.85       43.62
          5 |        352        3.52       47.14
          6 |        305        3.05       50.19
          7 |        249        2.49       52.68
          8 |        275        2.75       55.43
          9 |      1,425       14.25       69.68
          A |        185        1.85       71.53
          B |        159        1.59       73.12
          C |        247        2.47       75.59
          D |        152        1.52       77.11
          E |        111        1.11       78.22
          F |        114        1.14       79.36
          G |        134        1.34       80.70
          H |        192        1.92       82.62
          I |          3        0.03       82.65
          J |         41        0.41       83.06
          K |         59        0.59       83.65
          L |        284        2.84       86.49
          M |        100        1.00       87.49
          N |         89        0.89       88.38
          O |         14        0.14       88.52
          P |         99        0.99       89.51
          Q |         44        0.44       89.95
          R |        111        1.11       91.06
          S |        138        1.38       92.44
          T |         63        0.63       93.07
          U |        130        1.30       94.37
          V |         61        0.61       94.98
          W |         73        0.73       95.71
          X |         72        0.72       96.43
          Y |         47        0.47       96.90
          Z |        310        3.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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