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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,446       74.46       74.46
          1 |         33        0.33       74.79
          2 |         53        0.53       75.32
          3 |         41        0.41       75.73
          4 |         44        0.44       76.17
          5 |         47        0.47       76.64
          6 |         59        0.59       77.23
          7 |         63        0.63       77.86
          8 |         67        0.67       78.53
          9 |         73        0.73       79.26
         10 |         87        0.87       80.13
         11 |         99        0.99       81.12
         12 |        100        1.00       82.12
         13 |        100        1.00       83.12
         14 |        115        1.15       84.27
         15 |        118        1.18       85.45
         16 |        110        1.10       86.55
         17 |        115        1.15       87.70
         18 |        120        1.20       88.90
         19 |        117        1.17       90.07
         20 |        110        1.10       91.17
         21 |        118        1.18       92.35
         22 |         95        0.95       93.30
         23 |         98        0.98       94.28
         24 |         88        0.88       95.16
         25 |         83        0.83       95.99
         26 |         64        0.64       96.63
         27 |         48        0.48       97.11
         28 |         54        0.54       97.65
         29 |         33        0.33       97.98
         30 |         36        0.36       98.34
         31 |         32        0.32       98.66
         32 |         23        0.23       98.89
         33 |         19        0.19       99.08
         34 |         14        0.14       99.22
         35 |         11        0.11       99.33
         36 |         16        0.16       99.49
         37 |         11        0.11       99.60
         38 |          7        0.07       99.67
         39 |          4        0.04       99.71
         40 |          6        0.06       99.77
         42 |          2        0.02       99.79
         43 |          3        0.03       99.82
         44 |          8        0.08       99.90
         47 |          1        0.01       99.91
         48 |          2        0.02       99.93
         49 |          1        0.01       99.94
         50 |          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