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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,468       74.68       74.68
          1 |         39        0.39       75.07
          2 |         55        0.55       75.62
          3 |         64        0.64       76.26
          4 |         59        0.59       76.85
          5 |         64        0.64       77.49
          6 |         64        0.64       78.13
          7 |         61        0.61       78.74
          8 |        107        1.07       79.81
          9 |         84        0.84       80.65
         10 |         88        0.88       81.53
         11 |        116        1.16       82.69
         12 |        104        1.04       83.73
         13 |         88        0.88       84.61
         14 |        107        1.07       85.68
         15 |        130        1.30       86.98
         16 |        116        1.16       88.14
         17 |         95        0.95       89.09
         18 |        110        1.10       90.19
         19 |        104        1.04       91.23
         20 |        105        1.05       92.28
         21 |         87        0.87       93.15
         22 |         92        0.92       94.07
         23 |         87        0.87       94.94
         24 |         69        0.69       95.63
         25 |         61        0.61       96.24
         26 |         50        0.50       96.74
         27 |         52        0.52       97.26
         28 |         44        0.44       97.70
         29 |         29        0.29       97.99
         30 |         30        0.30       98.29
         31 |         22        0.22       98.51
         32 |         25        0.25       98.76
         33 |         22        0.22       98.98
         34 |         12        0.12       99.10
         35 |         14        0.14       99.24
         36 |         13        0.13       99.37
         37 |          3        0.03       99.40
         38 |         11        0.11       99.51
         39 |          8        0.08       99.59
         40 |          9        0.09       99.68
         41 |         11        0.11       99.79
         42 |          3        0.03       99.82
         43 |          4        0.04       99.86
         44 |          2        0.02       99.88
         45 |          3        0.03       99.91
         46 |          2        0.02       99.93
         47 |          2        0.02       99.95
         48 |          1        0.01       99.96
         49 |          2        0.02       99.98
         50 |          1        0.01       99.99
         58 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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