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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,504       75.04       75.04
          1 |         36        0.36       75.40
          2 |         68        0.68       76.08
          3 |         56        0.56       76.64
          4 |         55        0.55       77.19
          5 |         60        0.60       77.79
          6 |         72        0.72       78.51
          7 |         74        0.74       79.25
          8 |         83        0.83       80.08
          9 |         86        0.86       80.94
         10 |         96        0.96       81.90
         11 |         95        0.95       82.85
         12 |        116        1.16       84.01
         13 |         89        0.89       84.90
         14 |        111        1.11       86.01
         15 |        118        1.18       87.19
         16 |        111        1.11       88.30
         17 |        115        1.15       89.45
         18 |        133        1.33       90.78
         19 |         98        0.98       91.76
         20 |        101        1.01       92.77
         21 |         93        0.93       93.70
         22 |         89        0.89       94.59
         23 |         64        0.64       95.23
         24 |         66        0.66       95.89
         25 |         58        0.58       96.47
         26 |         46        0.46       96.93
         27 |         53        0.53       97.46
         28 |         40        0.40       97.86
         29 |         33        0.33       98.19
         30 |         28        0.28       98.47
         31 |         25        0.25       98.72
         32 |         24        0.24       98.96
         33 |         10        0.10       99.06
         34 |         17        0.17       99.23
         35 |         10        0.10       99.33
         36 |          7        0.07       99.40
         37 |          7        0.07       99.47
         38 |          8        0.08       99.55
         39 |          3        0.03       99.58
         40 |         10        0.10       99.68
         41 |          5        0.05       99.73
         42 |          2        0.02       99.75
         43 |          1        0.01       99.76
         44 |          2        0.02       99.78
         45 |          2        0.02       99.80
         46 |          2        0.02       99.82
         47 |          4        0.04       99.86
         48 |          3        0.03       99.89
         49 |          2        0.02       99.91
         50 |          2        0.02       99.93
         51 |          1        0.01       99.94
         53 |          1        0.01       99.95
         55 |          1        0.01       99.96
         58 |          1        0.01       99.97
         59 |          1        0.01       99.98
         63 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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