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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,477       74.77       74.77
          1 |         38        0.38       75.15
          2 |         64        0.64       75.79
          3 |         63        0.63       76.42
          4 |         61        0.61       77.03
          5 |         71        0.71       77.74
          6 |         71        0.71       78.45
          7 |         79        0.79       79.24
          8 |         91        0.91       80.15
          9 |         88        0.88       81.03
         10 |         91        0.91       81.94
         11 |         91        0.91       82.85
         12 |         91        0.91       83.76
         13 |         98        0.98       84.74
         14 |        106        1.06       85.80
         15 |        106        1.06       86.86
         16 |         90        0.90       87.76
         17 |        125        1.25       89.01
         18 |        118        1.18       90.19
         19 |        104        1.04       91.23
         20 |        117        1.17       92.40
         21 |         89        0.89       93.29
         22 |         88        0.88       94.17
         23 |         82        0.82       94.99
         24 |         69        0.69       95.68
         25 |         81        0.81       96.49
         26 |         69        0.69       97.18
         27 |         42        0.42       97.60
         28 |         41        0.41       98.01
         29 |         37        0.37       98.38
         30 |         40        0.40       98.78
         31 |         18        0.18       98.96
         32 |         19        0.19       99.15
         33 |         13        0.13       99.28
         34 |          6        0.06       99.34
         35 |         17        0.17       99.51
         36 |          9        0.09       99.60
         37 |          6        0.06       99.66
         38 |          1        0.01       99.67
         39 |          5        0.05       99.72
         40 |          3        0.03       99.75
         41 |          2        0.02       99.77
         42 |          4        0.04       99.81
         43 |          4        0.04       99.85
         44 |          3        0.03       99.88
         45 |          1        0.01       99.89
         46 |          2        0.02       99.91
         48 |          2        0.02       99.93
         49 |          1        0.01       99.94
         50 |          2        0.02       99.96
         51 |          1        0.01       99.97
         54 |          1        0.01       99.98
         60 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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