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

   vin body |
       type |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        526        5.26        5.26
         2D |         39        0.39        5.65
         2H |        195        1.95        7.60
         2T |          5        0.05        7.65
         2W |         48        0.48        8.13
         3C |         56        0.56        8.69
         3P |         15        0.15        8.84
         4B |          3        0.03        8.87
         4C |        286        2.86       11.73
         4D |      2,822       28.22       39.95
         4H |        100        1.00       40.95
         4T |          1        0.01       40.96
         4W |        302        3.02       43.98
         5D |          4        0.04       44.02
         AT |         32        0.32       44.34
         BU |          9        0.09       44.43
         C4 |          7        0.07       44.50
         CB |         46        0.46       44.96
         CC |         95        0.95       45.91
         CG |         57        0.57       46.48
         CH |          9        0.09       46.57
         CP |        520        5.20       51.77
         CV |        122        1.22       52.99
         CW |        477        4.77       57.76
         EC |         12        0.12       57.88
         EN |         17        0.17       58.05
         ES |        142        1.42       59.47
         GL |          1        0.01       59.48
         IC |          2        0.02       59.50
         MH |          5        0.05       59.55
         MS |         14        0.14       59.69
         MX |         12        0.12       59.81
         PC |        291        2.91       62.72
         PK |        461        4.61       67.33
         PS |          1        0.01       67.34
         RC |        400        4.00       71.34
         RD |          8        0.08       71.42
         RS |        624        6.24       77.66
         SN |          2        0.02       77.68
         SP |          6        0.06       77.74
         SV |        211        2.11       79.85
         SW |        116        1.16       81.01
          T |          9        0.09       81.10
         TB |         27        0.27       81.37
         TM |          1        0.01       81.38
         TR |        489        4.89       86.27
         UT |      1,350       13.50       99.77
         VN |          1        0.01       99.78
         YY |         22        0.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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