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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,511       75.11       75.11
          1 |         31        0.31       75.42
          2 |         63        0.63       76.05
          3 |         47        0.47       76.52
          4 |         62        0.62       77.14
          5 |         62        0.62       77.76
          6 |         66        0.66       78.42
          7 |         68        0.68       79.10
          8 |         95        0.95       80.05
          9 |         80        0.80       80.85
         10 |        104        1.04       81.89
         11 |         89        0.89       82.78
         12 |         92        0.92       83.70
         13 |         94        0.94       84.64
         14 |        118        1.18       85.82
         15 |        119        1.19       87.01
         16 |        120        1.20       88.21
         17 |        119        1.19       89.40
         18 |         97        0.97       90.37
         19 |        132        1.32       91.69
         20 |        101        1.01       92.70
         21 |         87        0.87       93.57
         22 |         77        0.77       94.34
         23 |         85        0.85       95.19
         24 |         61        0.61       95.80
         25 |         78        0.78       96.58
         26 |         66        0.66       97.24
         27 |         34        0.34       97.58
         28 |         38        0.38       97.96
         29 |         31        0.31       98.27
         30 |         26        0.26       98.53
         31 |         32        0.32       98.85
         32 |         24        0.24       99.09
         33 |         20        0.20       99.29
         34 |         14        0.14       99.43
         35 |          7        0.07       99.50
         36 |          5        0.05       99.55
         37 |          6        0.06       99.61
         38 |          7        0.07       99.68
         39 |          7        0.07       99.75
         40 |          6        0.06       99.81
         41 |          2        0.02       99.83
         42 |          5        0.05       99.88
         43 |          1        0.01       99.89
         44 |          3        0.03       99.92
         45 |          1        0.01       99.93
         46 |          1        0.01       99.94
         48 |          1        0.01       99.95
         51 |          1        0.01       99.96
         57 |          2        0.02       99.98
         67 |          1        0.01       99.99
         77 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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