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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,792       67.92       67.92
          1 |         26        0.26       68.18
          2 |         70        0.70       68.88
          3 |         76        0.76       69.64
          4 |         60        0.60       70.24
          5 |         86        0.86       71.10
          6 |         77        0.77       71.87
          7 |         91        0.91       72.78
          8 |         71        0.71       73.49
          9 |        108        1.08       74.57
         10 |        132        1.32       75.89
         11 |        125        1.25       77.14
         12 |        114        1.14       78.28
         13 |        135        1.35       79.63
         14 |        152        1.52       81.15
         15 |        141        1.41       82.56
         16 |        172        1.72       84.28
         17 |        149        1.49       85.77
         18 |        152        1.52       87.29
         19 |        144        1.44       88.73
         20 |        147        1.47       90.20
         21 |        126        1.26       91.46
         22 |        116        1.16       92.62
         23 |         92        0.92       93.54
         24 |         94        0.94       94.48
         25 |         90        0.90       95.38
         26 |         76        0.76       96.14
         27 |         51        0.51       96.65
         28 |         57        0.57       97.22
         29 |         48        0.48       97.70
         30 |         42        0.42       98.12
         31 |         32        0.32       98.44
         32 |         24        0.24       98.68
         33 |         25        0.25       98.93
         34 |         21        0.21       99.14
         35 |          6        0.06       99.20
         36 |         12        0.12       99.32
         37 |         15        0.15       99.47
         38 |         13        0.13       99.60
         39 |          8        0.08       99.68
         40 |          3        0.03       99.71
         41 |          6        0.06       99.77
         42 |          1        0.01       99.78
         43 |          4        0.04       99.82
         44 |          3        0.03       99.85
         45 |          3        0.03       99.88
         46 |          3        0.03       99.91
         47 |          3        0.03       99.94
         48 |          1        0.01       99.95
         50 |          1        0.01       99.96
         52 |          1        0.01       99.97
         54 |          1        0.01       99.98
         56 |          1        0.01       99.99
         88 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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