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

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,499       74.99       74.99
          1 |         36        0.36       75.35
          2 |         67        0.67       76.02
          3 |         54        0.54       76.56
          4 |         50        0.50       77.06
          5 |         56        0.56       77.62
          6 |         71        0.71       78.33
          7 |         78        0.78       79.11
          8 |         82        0.82       79.93
          9 |         81        0.81       80.74
         10 |        102        1.02       81.76
         11 |        109        1.09       82.85
         12 |        124        1.24       84.09
         13 |         92        0.92       85.01
         14 |        103        1.03       86.04
         15 |        112        1.12       87.16
         16 |        129        1.29       88.45
         17 |        121        1.21       89.66
         18 |        122        1.22       90.88
         19 |         98        0.98       91.86
         20 |         92        0.92       92.78
         21 |         91        0.91       93.69
         22 |         90        0.90       94.59
         23 |         69        0.69       95.28
         24 |         59        0.59       95.87
         25 |         58        0.58       96.45
         26 |         46        0.46       96.91
         27 |         52        0.52       97.43
         28 |         42        0.42       97.85
         29 |         35        0.35       98.20
         30 |         29        0.29       98.49
         31 |         26        0.26       98.75
         32 |         21        0.21       98.96
         33 |         12        0.12       99.08
         34 |         12        0.12       99.20
         35 |          8        0.08       99.28
         36 |          5        0.05       99.33
         37 |         12        0.12       99.45
         38 |         10        0.10       99.55
         39 |          6        0.06       99.61
         40 |          9        0.09       99.70
         41 |          6        0.06       99.76
         42 |          2        0.02       99.78
         43 |          3        0.03       99.81
         45 |          2        0.02       99.83
         46 |          3        0.03       99.86
         47 |          3        0.03       99.89
         48 |          3        0.03       99.92
         49 |          2        0.02       99.94
         50 |          1        0.01       99.95
         53 |          2        0.02       99.97
         55 |          1        0.01       99.98
         58 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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