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

       make |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        212        2.12        2.12
          3 |         12        0.12        2.24
          6 |        115        1.15        3.39
          7 |        601        6.01        9.40
          9 |         92        0.92       10.32
         10 |         10        0.10       10.42
         12 |      1,628       16.28       26.70
         13 |         57        0.57       27.27
         14 |        155        1.55       28.82
         18 |        151        1.51       30.33
         19 |         98        0.98       31.31
         20 |      1,688       16.88       48.19
         21 |        120        1.20       49.39
         22 |        214        2.14       51.53
         23 |        307        3.07       54.60
         24 |         88        0.88       55.48
         30 |         47        0.47       55.95
         32 |         11        0.11       56.06
         34 |         37        0.37       56.43
         35 |        444        4.44       60.87
         37 |        537        5.37       66.24
         38 |         79        0.79       67.03
         39 |          8        0.08       67.11
         41 |        148        1.48       68.59
         42 |         54        0.54       69.13
         45 |          8        0.08       69.21
         47 |          2        0.02       69.23
         48 |         26        0.26       69.49
         49 |        705        7.05       76.54
         50 |          6        0.06       76.60
         51 |         73        0.73       77.33
         52 |        136        1.36       78.69
         53 |        118        1.18       79.87
         54 |         92        0.92       80.79
         55 |        106        1.06       81.85
         58 |         23        0.23       82.08
         59 |         55        0.55       82.63
         62 |          7        0.07       82.70
         63 |         78        0.78       83.48
         64 |         12        0.12       83.60
         69 |          2        0.02       83.62
         71 |          6        0.06       83.68
         72 |        150        1.50       85.18
         73 |         50        0.50       85.68
         76 |         74        0.74       86.42
         82 |        158        1.58       88.00
         84 |        112        1.12       89.12
         85 |         71        0.71       89.83
         86 |         29        0.29       90.12
         87 |         65        0.65       90.77
         89 |          9        0.09       90.86
         90 |          7        0.07       90.93
         94 |         22        0.22       91.15
         98 |         76        0.76       91.91
         99 |        187        1.87       93.78
          . |        622        6.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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