Frequencies for first 10,000 rows of p1 variable in miper dataset :

         p1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,453       74.53       74.53
          1 |         39        0.39       74.92
          2 |         58        0.58       75.50
          3 |         60        0.60       76.10
          4 |         56        0.56       76.66
          5 |         62        0.62       77.28
          6 |         65        0.65       77.93
          7 |         65        0.65       78.58
          8 |        103        1.03       79.61
          9 |         96        0.96       80.57
         10 |         88        0.88       81.45
         11 |        118        1.18       82.63
         12 |        104        1.04       83.67
         13 |         95        0.95       84.62
         14 |        100        1.00       85.62
         15 |        128        1.28       86.90
         16 |         99        0.99       87.89
         17 |         91        0.91       88.80
         18 |        115        1.15       89.95
         19 |        114        1.14       91.09
         20 |        114        1.14       92.23
         21 |         80        0.80       93.03
         22 |         95        0.95       93.98
         23 |         90        0.90       94.88
         24 |         62        0.62       95.50
         25 |         62        0.62       96.12
         26 |         56        0.56       96.68
         27 |         59        0.59       97.27
         28 |         37        0.37       97.64
         29 |         28        0.28       97.92
         30 |         33        0.33       98.25
         31 |         28        0.28       98.53
         32 |         25        0.25       98.78
         33 |         21        0.21       98.99
         34 |         14        0.14       99.13
         35 |         16        0.16       99.29
         36 |         15        0.15       99.44
         37 |          5        0.05       99.49
         38 |          9        0.09       99.58
         39 |          8        0.08       99.66
         40 |          7        0.07       99.73
         41 |          6        0.06       99.79
         43 |          4        0.04       99.83
         44 |          4        0.04       99.87
         45 |          2        0.02       99.89
         46 |          2        0.02       99.91
         47 |          2        0.02       99.93
         48 |          3        0.03       99.96
         49 |          2        0.02       99.98
         50 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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