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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,502       75.02       75.02
          1 |         37        0.37       75.39
          2 |         69        0.69       76.08
          3 |         64        0.64       76.72
          4 |         54        0.54       77.26
          5 |         50        0.50       77.76
          6 |         63        0.63       78.39
          7 |         74        0.74       79.13
          8 |         87        0.87       80.00
          9 |         92        0.92       80.92
         10 |         86        0.86       81.78
         11 |         98        0.98       82.76
         12 |        105        1.05       83.81
         13 |        102        1.02       84.83
         14 |        131        1.31       86.14
         15 |        100        1.00       87.14
         16 |        122        1.22       88.36
         17 |        105        1.05       89.41
         18 |        111        1.11       90.52
         19 |        104        1.04       91.56
         20 |         99        0.99       92.55
         21 |         92        0.92       93.47
         22 |         76        0.76       94.23
         23 |         77        0.77       95.00
         24 |         70        0.70       95.70
         25 |         65        0.65       96.35
         26 |         68        0.68       97.03
         27 |         52        0.52       97.55
         28 |         39        0.39       97.94
         29 |         38        0.38       98.32
         30 |         33        0.33       98.65
         31 |         21        0.21       98.86
         32 |         26        0.26       99.12
         33 |         13        0.13       99.25
         34 |         13        0.13       99.38
         35 |         12        0.12       99.50
         36 |          9        0.09       99.59
         37 |          4        0.04       99.63
         38 |          6        0.06       99.69
         39 |          6        0.06       99.75
         40 |          5        0.05       99.80
         41 |          2        0.02       99.82
         42 |          3        0.03       99.85
         43 |          4        0.04       99.89
         44 |          5        0.05       99.94
         45 |          4        0.04       99.98
         48 |          1        0.01       99.99
         53 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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