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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,338       73.38       73.38
          1 |         42        0.42       73.80
          2 |         60        0.60       74.40
          3 |         64        0.64       75.04
          4 |         63        0.63       75.67
          5 |         59        0.59       76.26
          6 |         67        0.67       76.93
          7 |         76        0.76       77.69
          8 |         92        0.92       78.61
          9 |         98        0.98       79.59
         10 |        101        1.01       80.60
         11 |         95        0.95       81.55
         12 |        115        1.15       82.70
         13 |        130        1.30       84.00
         14 |        111        1.11       85.11
         15 |        115        1.15       86.26
         16 |        124        1.24       87.50
         17 |        128        1.28       88.78
         18 |        136        1.36       90.14
         19 |        119        1.19       91.33
         20 |        108        1.08       92.41
         21 |         99        0.99       93.40
         22 |         87        0.87       94.27
         23 |         75        0.75       95.02
         24 |         70        0.70       95.72
         25 |         60        0.60       96.32
         26 |         51        0.51       96.83
         27 |         65        0.65       97.48
         28 |         40        0.40       97.88
         29 |         26        0.26       98.14
         30 |         29        0.29       98.43
         31 |         22        0.22       98.65
         32 |         26        0.26       98.91
         33 |         21        0.21       99.12
         34 |         17        0.17       99.29
         35 |         16        0.16       99.45
         36 |         13        0.13       99.58
         37 |          8        0.08       99.66
         38 |          7        0.07       99.73
         39 |          5        0.05       99.78
         40 |          5        0.05       99.83
         41 |          3        0.03       99.86
         42 |          2        0.02       99.88
         43 |          3        0.03       99.91
         44 |          1        0.01       99.92
         45 |          3        0.03       99.95
         47 |          1        0.01       99.96
         48 |          1        0.01       99.97
         50 |          1        0.01       99.98
         51 |          1        0.01       99.99
         52 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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