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

   VIN Body |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,399       13.99       13.99
         2D |         45        0.45       14.44
         2H |        164        1.64       16.08
         2T |         11        0.11       16.19
         2W |         42        0.42       16.61
         3C |         55        0.55       17.16
         3P |          9        0.09       17.25
         4B |          3        0.03       17.28
         4C |        277        2.77       20.05
         4D |      2,361       23.61       43.66
         4H |         60        0.60       44.26
         4W |        255        2.55       46.81
         5D |          7        0.07       46.88
         AT |         28        0.28       47.16
         BU |         49        0.49       47.65
         C4 |          7        0.07       47.72
         CB |         31        0.31       48.03
         CC |         90        0.90       48.93
         CG |         32        0.32       49.25
         CH |          4        0.04       49.29
         CL |          2        0.02       49.31
         CP |        453        4.53       53.84
         CV |        109        1.09       54.93
         CW |        497        4.97       59.90
         EC |         21        0.21       60.11
         EN |         12        0.12       60.23
         ES |        205        2.05       62.28
         HR |          1        0.01       62.29
         IC |         29        0.29       62.58
         LL |          1        0.01       62.59
         MH |          3        0.03       62.62
         MS |          5        0.05       62.67
         MX |          4        0.04       62.71
         PC |        316        3.16       65.87
         PK |        441        4.41       70.28
         RC |        220        2.20       72.48
         RD |          5        0.05       72.53
         RS |        383        3.83       76.36
         SN |          1        0.01       76.37
         SP |          7        0.07       76.44
         SV |        287        2.87       79.31
         SW |         78        0.78       80.09
          T |         10        0.10       80.19
         TB |         22        0.22       80.41
         TR |        365        3.65       84.06
         UT |      1,551       15.51       99.57
         VN |          1        0.01       99.58
         YY |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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