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

        VIN |
Character(3 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         31        0.31        0.31
          1 |      1,077       10.77       11.08
          2 |        493        4.93       16.01
          3 |        581        5.81       21.82
          4 |        879        8.79       30.61
          5 |         37        0.37       30.98
          6 |        194        1.94       32.92
          7 |        261        2.61       35.53
          8 |        276        2.76       38.29
          9 |        377        3.77       42.06
          A |        764        7.64       49.70
          B |        185        1.85       51.55
          C |        488        4.88       56.43
          D |        595        5.95       62.38
          E |        204        2.04       64.42
          F |         68        0.68       65.10
          G |        381        3.81       68.91
          H |        143        1.43       70.34
          I |          1        0.01       70.35
          J |         38        0.38       70.73
          K |        290        2.90       73.63
          L |         84        0.84       74.47
          M |        560        5.60       80.07
          N |        431        4.31       84.38
          O |          1        0.01       84.39
          P |        106        1.06       85.45
          R |         34        0.34       85.79
          S |         68        0.68       86.47
          T |        742        7.42       93.89
          U |        207        2.07       95.96
          V |         88        0.88       96.84
          W |         98        0.98       97.82
          X |        145        1.45       99.27
          Y |         39        0.39       99.66
          Z |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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