Frequencies for first 10,000 rows of p9 variable in miper dataset :

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,443       74.43       74.43
          1 |         46        0.46       74.89
          2 |         63        0.63       75.52
          3 |         62        0.62       76.14
          4 |         70        0.70       76.84
          5 |         67        0.67       77.51
          6 |         60        0.60       78.11
          7 |         68        0.68       78.79
          8 |         81        0.81       79.60
          9 |        102        1.02       80.62
         10 |         98        0.98       81.60
         11 |        123        1.23       82.83
         12 |        107        1.07       83.90
         13 |         95        0.95       84.85
         14 |        105        1.05       85.90
         15 |        104        1.04       86.94
         16 |        124        1.24       88.18
         17 |        130        1.30       89.48
         18 |        106        1.06       90.54
         19 |        107        1.07       91.61
         20 |        107        1.07       92.68
         21 |         89        0.89       93.57
         22 |         96        0.96       94.53
         23 |         75        0.75       95.28
         24 |         56        0.56       95.84
         25 |         74        0.74       96.58
         26 |         53        0.53       97.11
         27 |         47        0.47       97.58
         28 |         40        0.40       97.98
         29 |         29        0.29       98.27
         30 |         31        0.31       98.58
         31 |         16        0.16       98.74
         32 |         20        0.20       98.94
         33 |         18        0.18       99.12
         34 |         12        0.12       99.24
         35 |         13        0.13       99.37
         36 |         11        0.11       99.48
         37 |         13        0.13       99.61
         38 |          5        0.05       99.66
         39 |          6        0.06       99.72
         40 |          3        0.03       99.75
         41 |          5        0.05       99.80
         42 |          3        0.03       99.83
         43 |          1        0.01       99.84
         44 |          1        0.01       99.85
         45 |          2        0.02       99.87
         46 |          2        0.02       99.89
         47 |          4        0.04       99.93
         52 |          3        0.03       99.96
         53 |          1        0.01       99.97
         55 |          2        0.02       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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