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

       make |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        164        1.64        1.64
          3 |          7        0.07        1.71
          6 |        101        1.01        2.72
          7 |        575        5.75        8.47
          9 |        114        1.14        9.61
         10 |         12        0.12        9.73
         12 |      1,835       18.35       28.08
         13 |         84        0.84       28.92
         14 |        156        1.56       30.48
         18 |        201        2.01       32.49
         19 |         67        0.67       33.16
         20 |      1,646       16.46       49.62
         21 |        159        1.59       51.21
         22 |        251        2.51       53.72
         23 |        366        3.66       57.38
         24 |         93        0.93       58.31
         30 |         62        0.62       58.93
         32 |          8        0.08       59.01
         34 |         38        0.38       59.39
         35 |        445        4.45       63.84
         37 |        564        5.64       69.48
         38 |         82        0.82       70.30
         39 |          3        0.03       70.33
         41 |        124        1.24       71.57
         42 |         37        0.37       71.94
         45 |          7        0.07       72.01
         47 |          2        0.02       72.03
         48 |         25        0.25       72.28
         49 |        594        5.94       78.22
         50 |          2        0.02       78.24
         51 |         76        0.76       79.00
         52 |        136        1.36       80.36
         53 |         80        0.80       81.16
         54 |         56        0.56       81.72
         55 |        102        1.02       82.74
         58 |         21        0.21       82.95
         59 |         32        0.32       83.27
         62 |         11        0.11       83.38
         63 |         52        0.52       83.90
         64 |         15        0.15       84.05
         69 |          4        0.04       84.09
         71 |          3        0.03       84.12
         72 |        112        1.12       85.24
         73 |         55        0.55       85.79
         76 |         57        0.57       86.36
         82 |        142        1.42       87.78
         84 |        138        1.38       89.16
         85 |         50        0.50       89.66
         86 |         34        0.34       90.00
         87 |         61        0.61       90.61
         89 |         10        0.10       90.71
         90 |          1        0.01       90.72
         93 |         40        0.40       91.12
         98 |        132        1.32       92.44
         99 |        187        1.87       94.31
          . |        569        5.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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