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

         p1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,401       74.01       74.01
          1 |         33        0.33       74.34
          2 |         53        0.53       74.87
          3 |         48        0.48       75.35
          4 |         45        0.45       75.80
          5 |         59        0.59       76.39
          6 |         68        0.68       77.07
          7 |         75        0.75       77.82
          8 |         87        0.87       78.69
          9 |         81        0.81       79.50
         10 |         76        0.76       80.26
         11 |        100        1.00       81.26
         12 |         97        0.97       82.23
         13 |        111        1.11       83.34
         14 |        126        1.26       84.60
         15 |        119        1.19       85.79
         16 |        115        1.15       86.94
         17 |        106        1.06       88.00
         18 |        108        1.08       89.08
         19 |        118        1.18       90.26
         20 |        100        1.00       91.26
         21 |        132        1.32       92.58
         22 |         76        0.76       93.34
         23 |         79        0.79       94.13
         24 |         86        0.86       94.99
         25 |         65        0.65       95.64
         26 |         69        0.69       96.33
         27 |         62        0.62       96.95
         28 |         56        0.56       97.51
         29 |         34        0.34       97.85
         30 |         28        0.28       98.13
         31 |         32        0.32       98.45
         32 |         18        0.18       98.63
         33 |         20        0.20       98.83
         34 |         24        0.24       99.07
         35 |         17        0.17       99.24
         36 |          8        0.08       99.32
         37 |         18        0.18       99.50
         38 |         13        0.13       99.63
         39 |          8        0.08       99.71
         40 |         10        0.10       99.81
         41 |          5        0.05       99.86
         42 |          1        0.01       99.87
         43 |          3        0.03       99.90
         44 |          2        0.02       99.92
         45 |          2        0.02       99.94
         46 |          4        0.04       99.98
         53 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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