Frequencies for first 10,000 rows of p2 variable in miper dataset :

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,398       73.98       73.98
          1 |         46        0.46       74.44
          2 |         64        0.64       75.08
          3 |         59        0.59       75.67
          4 |         60        0.60       76.27
          5 |         65        0.65       76.92
          6 |         73        0.73       77.65
          7 |         87        0.87       78.52
          8 |         82        0.82       79.34
          9 |         89        0.89       80.23
         10 |        101        1.01       81.24
         11 |         91        0.91       82.15
         12 |         83        0.83       82.98
         13 |        104        1.04       84.02
         14 |        131        1.31       85.33
         15 |        100        1.00       86.33
         16 |        130        1.30       87.63
         17 |        106        1.06       88.69
         18 |        115        1.15       89.84
         19 |        109        1.09       90.93
         20 |        100        1.00       91.93
         21 |        102        1.02       92.95
         22 |         94        0.94       93.89
         23 |         71        0.71       94.60
         24 |         73        0.73       95.33
         25 |         65        0.65       95.98
         26 |         62        0.62       96.60
         27 |         51        0.51       97.11
         28 |         45        0.45       97.56
         29 |         27        0.27       97.83
         30 |         34        0.34       98.17
         31 |         30        0.30       98.47
         32 |         27        0.27       98.74
         33 |         20        0.20       98.94
         34 |         15        0.15       99.09
         35 |         11        0.11       99.20
         36 |          9        0.09       99.29
         37 |         13        0.13       99.42
         38 |         12        0.12       99.54
         39 |          8        0.08       99.62
         40 |         11        0.11       99.73
         41 |          4        0.04       99.77
         42 |          2        0.02       99.79
         43 |          4        0.04       99.83
         44 |          1        0.01       99.84
         45 |          3        0.03       99.87
         46 |          1        0.01       99.88
         47 |          1        0.01       99.89
         48 |          2        0.02       99.91
         49 |          1        0.01       99.92
         50 |          1        0.01       99.93
         51 |          1        0.01       99.94
         58 |          1        0.01       99.95
         61 |          2        0.02       99.97
         65 |          1        0.01       99.98
         68 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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