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

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,325       63.25       63.25
          1 |         41        0.41       63.66
          2 |         75        0.75       64.41
          3 |         94        0.94       65.35
          4 |         93        0.93       66.28
          5 |         93        0.93       67.21
          6 |        104        1.04       68.25
          7 |        109        1.09       69.34
          8 |        123        1.23       70.57
          9 |        144        1.44       72.01
         10 |        162        1.62       73.63
         11 |        149        1.49       75.12
         12 |        161        1.61       76.73
         13 |        177        1.77       78.50
         14 |        168        1.68       80.18
         15 |        194        1.94       82.12
         16 |        166        1.66       83.78
         17 |        174        1.74       85.52
         18 |        164        1.64       87.16
         19 |        151        1.51       88.67
         20 |        132        1.32       89.99
         21 |        120        1.20       91.19
         22 |        120        1.20       92.39
         23 |        105        1.05       93.44
         24 |        105        1.05       94.49
         25 |        104        1.04       95.53
         26 |         80        0.80       96.33
         27 |         62        0.62       96.95
         28 |         52        0.52       97.47
         29 |         52        0.52       97.99
         30 |         43        0.43       98.42
         31 |         29        0.29       98.71
         32 |         23        0.23       98.94
         33 |         25        0.25       99.19
         34 |         15        0.15       99.34
         35 |          9        0.09       99.43
         36 |          8        0.08       99.51
         37 |          8        0.08       99.59
         38 |          8        0.08       99.67
         39 |          9        0.09       99.76
         40 |          4        0.04       99.80
         41 |          6        0.06       99.86
         42 |          1        0.01       99.87
         43 |          4        0.04       99.91
         44 |          3        0.03       99.94
         45 |          2        0.02       99.96
         49 |          1        0.01       99.97
         53 |          1        0.01       99.98
         57 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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