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

         p3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,466       74.66       74.66
          1 |         34        0.34       75.00
          2 |         53        0.53       75.53
          3 |         43        0.43       75.96
          4 |         49        0.49       76.45
          5 |         45        0.45       76.90
          6 |         61        0.61       77.51
          7 |         67        0.67       78.18
          8 |         68        0.68       78.86
          9 |         69        0.69       79.55
         10 |         80        0.80       80.35
         11 |        107        1.07       81.42
         12 |         95        0.95       82.37
         13 |        100        1.00       83.37
         14 |        116        1.16       84.53
         15 |        114        1.14       85.67
         16 |        107        1.07       86.74
         17 |        118        1.18       87.92
         18 |        128        1.28       89.20
         19 |        112        1.12       90.32
         20 |        110        1.10       91.42
         21 |        108        1.08       92.50
         22 |         92        0.92       93.42
         23 |         88        0.88       94.30
         24 |         86        0.86       95.16
         25 |         80        0.80       95.96
         26 |         66        0.66       96.62
         27 |         46        0.46       97.08
         28 |         51        0.51       97.59
         29 |         36        0.36       97.95
         30 |         38        0.38       98.33
         31 |         27        0.27       98.60
         32 |         26        0.26       98.86
         33 |         24        0.24       99.10
         34 |         14        0.14       99.24
         35 |          7        0.07       99.31
         36 |         16        0.16       99.47
         37 |         11        0.11       99.58
         38 |          4        0.04       99.62
         39 |          4        0.04       99.66
         40 |          6        0.06       99.72
         41 |          4        0.04       99.76
         42 |          3        0.03       99.79
         43 |          3        0.03       99.82
         44 |          7        0.07       99.89
         47 |          2        0.02       99.91
         48 |          2        0.02       99.93
         50 |          1        0.01       99.94
         51 |          1        0.01       99.95
         67 |          1        0.01       99.96
         68 |          1        0.01       99.97
         79 |          1        0.01       99.98
         94 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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