Frequencies for first 10,000 rows of p7 variable in miper dataset :

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,536       75.36       75.36
          1 |         30        0.30       75.66
          2 |         62        0.62       76.28
          3 |         56        0.56       76.84
          4 |         60        0.60       77.44
          5 |         57        0.57       78.01
          6 |         69        0.69       78.70
          7 |         69        0.69       79.39
          8 |         81        0.81       80.20
          9 |         93        0.93       81.13
         10 |         94        0.94       82.07
         11 |         90        0.90       82.97
         12 |         99        0.99       83.96
         13 |        106        1.06       85.02
         14 |        121        1.21       86.23
         15 |        111        1.11       87.34
         16 |        115        1.15       88.49
         17 |        112        1.12       89.61
         18 |         98        0.98       90.59
         19 |        110        1.10       91.69
         20 |         97        0.97       92.66
         21 |         94        0.94       93.60
         22 |         79        0.79       94.39
         23 |         75        0.75       95.14
         24 |         62        0.62       95.76
         25 |         61        0.61       96.37
         26 |         67        0.67       97.04
         27 |         36        0.36       97.40
         28 |         42        0.42       97.82
         29 |         33        0.33       98.15
         30 |         31        0.31       98.46
         31 |         29        0.29       98.75
         32 |         28        0.28       99.03
         33 |         18        0.18       99.21
         34 |         15        0.15       99.36
         35 |          7        0.07       99.43
         36 |          9        0.09       99.52
         37 |          8        0.08       99.60
         38 |          7        0.07       99.67
         39 |          3        0.03       99.70
         40 |          6        0.06       99.76
         41 |          3        0.03       99.79
         42 |          6        0.06       99.85
         43 |          2        0.02       99.87
         44 |          3        0.03       99.90
         45 |          4        0.04       99.94
         47 |          2        0.02       99.96
         49 |          1        0.01       99.97
         51 |          1        0.01       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