Frequencies for first 10,000 rows of p2 variable in miper dataset :

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,471       64.71       64.71
          1 |         32        0.32       65.03
          2 |         78        0.78       65.81
          3 |         78        0.78       66.59
          4 |         66        0.66       67.25
          5 |         92        0.92       68.17
          6 |         82        0.82       68.99
          7 |        104        1.04       70.03
          8 |        127        1.27       71.30
          9 |        122        1.22       72.52
         10 |        119        1.19       73.71
         11 |        143        1.43       75.14
         12 |        176        1.76       76.90
         13 |        164        1.64       78.54
         14 |        156        1.56       80.10
         15 |        182        1.82       81.92
         16 |        180        1.80       83.72
         17 |        169        1.69       85.41
         18 |        171        1.71       87.12
         19 |        143        1.43       88.55
         20 |        132        1.32       89.87
         21 |        140        1.40       91.27
         22 |        108        1.08       92.35
         23 |        108        1.08       93.43
         24 |         90        0.90       94.33
         25 |         79        0.79       95.12
         26 |         90        0.90       96.02
         27 |         69        0.69       96.71
         28 |         59        0.59       97.30
         29 |         39        0.39       97.69
         30 |         42        0.42       98.11
         31 |         41        0.41       98.52
         32 |         28        0.28       98.80
         33 |         28        0.28       99.08
         34 |         23        0.23       99.31
         35 |         13        0.13       99.44
         36 |         10        0.10       99.54
         37 |         11        0.11       99.65
         38 |         11        0.11       99.76
         39 |          4        0.04       99.80
         40 |          6        0.06       99.86
         41 |          5        0.05       99.91
         42 |          2        0.02       99.93
         43 |          2        0.02       99.95
         44 |          1        0.01       99.96
         45 |          1        0.01       99.97
         49 |          1        0.01       99.98
         59 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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