Frequencies for first 10,000 rows of p7 variable in miper dataset :

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,359       63.59       63.59
          1 |         42        0.42       64.01
          2 |         72        0.72       64.73
          3 |         92        0.92       65.65
          4 |         99        0.99       66.64
          5 |        105        1.05       67.69
          6 |        126        1.26       68.95
          7 |        108        1.08       70.03
          8 |        129        1.29       71.32
          9 |        137        1.37       72.69
         10 |        157        1.57       74.26
         11 |        158        1.58       75.84
         12 |        139        1.39       77.23
         13 |        165        1.65       78.88
         14 |        159        1.59       80.47
         15 |        163        1.63       82.10
         16 |        164        1.64       83.74
         17 |        180        1.80       85.54
         18 |        177        1.77       87.31
         19 |        146        1.46       88.77
         20 |        145        1.45       90.22
         21 |        122        1.22       91.44
         22 |        123        1.23       92.67
         23 |        121        1.21       93.88
         24 |         85        0.85       94.73
         25 |         87        0.87       95.60
         26 |         82        0.82       96.42
         27 |         64        0.64       97.06
         28 |         50        0.50       97.56
         29 |         52        0.52       98.08
         30 |         46        0.46       98.54
         31 |         29        0.29       98.83
         32 |         20        0.20       99.03
         33 |         20        0.20       99.23
         34 |         16        0.16       99.39
         35 |          8        0.08       99.47
         36 |          7        0.07       99.54
         37 |          6        0.06       99.60
         38 |          6        0.06       99.66
         39 |          7        0.07       99.73
         40 |          6        0.06       99.79
         41 |          4        0.04       99.83
         42 |          2        0.02       99.85
         43 |          2        0.02       99.87
         44 |          4        0.04       99.91
         45 |          2        0.02       99.93
         46 |          1        0.01       99.94
         47 |          1        0.01       99.95
         48 |          1        0.01       99.96
         49 |          1        0.01       99.97
         57 |          2        0.02       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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