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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,358       63.58       63.58
          1 |         48        0.48       64.06
          2 |         75        0.75       64.81
          3 |         81        0.81       65.62
          4 |         75        0.75       66.37
          5 |         96        0.96       67.33
          6 |        100        1.00       68.33
          7 |        127        1.27       69.60
          8 |        110        1.10       70.70
          9 |        139        1.39       72.09
         10 |        118        1.18       73.27
         11 |        138        1.38       74.65
         12 |        151        1.51       76.16
         13 |        163        1.63       77.79
         14 |        171        1.71       79.50
         15 |        156        1.56       81.06
         16 |        191        1.91       82.97
         17 |        172        1.72       84.69
         18 |        162        1.62       86.31
         19 |        165        1.65       87.96
         20 |        160        1.60       89.56
         21 |        141        1.41       90.97
         22 |        142        1.42       92.39
         23 |        105        1.05       93.44
         24 |         90        0.90       94.34
         25 |         90        0.90       95.24
         26 |         82        0.82       96.06
         27 |         66        0.66       96.72
         28 |         65        0.65       97.37
         29 |         41        0.41       97.78
         30 |         35        0.35       98.13
         31 |         34        0.34       98.47
         32 |         31        0.31       98.78
         33 |         19        0.19       98.97
         34 |         23        0.23       99.20
         35 |         13        0.13       99.33
         36 |         14        0.14       99.47
         37 |          9        0.09       99.56
         38 |          2        0.02       99.58
         39 |         11        0.11       99.69
         40 |          5        0.05       99.74
         41 |          4        0.04       99.78
         42 |          3        0.03       99.81
         43 |          3        0.03       99.84
         44 |          3        0.03       99.87
         46 |          2        0.02       99.89
         47 |          1        0.01       99.90
         48 |          1        0.01       99.91
         49 |          3        0.03       99.94
         51 |          2        0.02       99.96
         54 |          1        0.01       99.97
         55 |          1        0.01       99.98
         57 |          1        0.01       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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