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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,479       74.79       74.79
          1 |         47        0.47       75.26
          2 |         59        0.59       75.85
          3 |         34        0.34       76.19
          4 |         46        0.46       76.65
          5 |         54        0.54       77.19
          6 |         57        0.57       77.76
          7 |         60        0.60       78.36
          8 |         59        0.59       78.95
          9 |         78        0.78       79.73
         10 |         90        0.90       80.63
         11 |        109        1.09       81.72
         12 |        103        1.03       82.75
         13 |        109        1.09       83.84
         14 |        101        1.01       84.85
         15 |        111        1.11       85.96
         16 |        112        1.12       87.08
         17 |        113        1.13       88.21
         18 |         97        0.97       89.18
         19 |        124        1.24       90.42
         20 |        101        1.01       91.43
         21 |        114        1.14       92.57
         22 |        107        1.07       93.64
         23 |         92        0.92       94.56
         24 |         80        0.80       95.36
         25 |         62        0.62       95.98
         26 |         55        0.55       96.53
         27 |         48        0.48       97.01
         28 |         42        0.42       97.43
         29 |         40        0.40       97.83
         30 |         44        0.44       98.27
         31 |         24        0.24       98.51
         32 |         24        0.24       98.75
         33 |         16        0.16       98.91
         34 |         16        0.16       99.07
         35 |         16        0.16       99.23
         36 |         17        0.17       99.40
         37 |          7        0.07       99.47
         38 |          5        0.05       99.52
         39 |          6        0.06       99.58
         40 |         10        0.10       99.68
         41 |          9        0.09       99.77
         42 |          6        0.06       99.83
         43 |          4        0.04       99.87
         44 |          2        0.02       99.89
         45 |          1        0.01       99.90
         46 |          2        0.02       99.92
         47 |          1        0.01       99.93
         50 |          1        0.01       99.94
         51 |          1        0.01       99.95
         52 |          1        0.01       99.96
         54 |          1        0.01       99.97
         60 |          1        0.01       99.98
         63 |          1        0.01       99.99
         65 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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