Frequencies for first 10,000 rows of p3 variable in miper dataset :

         p3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,476       74.76       74.76
          1 |         39        0.39       75.15
          2 |         56        0.56       75.71
          3 |         58        0.58       76.29
          4 |         49        0.49       76.78
          5 |         64        0.64       77.42
          6 |         60        0.60       78.02
          7 |         77        0.77       78.79
          8 |         87        0.87       79.66
          9 |         84        0.84       80.50
         10 |         91        0.91       81.41
         11 |        115        1.15       82.56
         12 |        112        1.12       83.68
         13 |         99        0.99       84.67
         14 |        115        1.15       85.82
         15 |        114        1.14       86.96
         16 |        104        1.04       88.00
         17 |         91        0.91       88.91
         18 |        115        1.15       90.06
         19 |        103        1.03       91.09
         20 |         98        0.98       92.07
         21 |         76        0.76       92.83
         22 |         90        0.90       93.73
         23 |         93        0.93       94.66
         24 |         62        0.62       95.28
         25 |         62        0.62       95.90
         26 |         59        0.59       96.49
         27 |         52        0.52       97.01
         28 |         41        0.41       97.42
         29 |         36        0.36       97.78
         30 |         31        0.31       98.09
         31 |         28        0.28       98.37
         32 |         25        0.25       98.62
         33 |         23        0.23       98.85
         34 |         14        0.14       98.99
         35 |         18        0.18       99.17
         36 |         15        0.15       99.32
         37 |          6        0.06       99.38
         38 |         12        0.12       99.50
         39 |          8        0.08       99.58
         40 |          9        0.09       99.67
         41 |          7        0.07       99.74
         42 |          3        0.03       99.77
         43 |          3        0.03       99.80
         44 |          3        0.03       99.83
         45 |          3        0.03       99.86
         46 |          4        0.04       99.90
         47 |          2        0.02       99.92
         48 |          2        0.02       99.94
         49 |          3        0.03       99.97
         50 |          2        0.02       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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