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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,403       74.03       74.03
          1 |         28        0.28       74.31
          2 |         60        0.60       74.91
          3 |         63        0.63       75.54
          4 |         54        0.54       76.08
          5 |         48        0.48       76.56
          6 |         90        0.90       77.46
          7 |         71        0.71       78.17
          8 |         81        0.81       78.98
          9 |         84        0.84       79.82
         10 |        112        1.12       80.94
         11 |        115        1.15       82.09
         12 |        117        1.17       83.26
         13 |        106        1.06       84.32
         14 |        107        1.07       85.39
         15 |         96        0.96       86.35
         16 |         97        0.97       87.32
         17 |        104        1.04       88.36
         18 |        127        1.27       89.63
         19 |        103        1.03       90.66
         20 |        118        1.18       91.84
         21 |        109        1.09       92.93
         22 |         90        0.90       93.83
         23 |         93        0.93       94.76
         24 |         62        0.62       95.38
         25 |         69        0.69       96.07
         26 |         52        0.52       96.59
         27 |         56        0.56       97.15
         28 |         51        0.51       97.66
         29 |         30        0.30       97.96
         30 |         42        0.42       98.38
         31 |         25        0.25       98.63
         32 |         21        0.21       98.84
         33 |         20        0.20       99.04
         34 |         15        0.15       99.19
         35 |         16        0.16       99.35
         36 |         11        0.11       99.46
         37 |          9        0.09       99.55
         38 |         11        0.11       99.66
         39 |          5        0.05       99.71
         40 |          5        0.05       99.76
         41 |          3        0.03       99.79
         42 |          6        0.06       99.85
         43 |          3        0.03       99.88
         45 |          1        0.01       99.89
         46 |          1        0.01       99.90
         49 |          2        0.02       99.92
         51 |          1        0.01       99.93
         52 |          2        0.02       99.95
         54 |          1        0.01       99.96
         55 |          1        0.01       99.97
         58 |          1        0.01       99.98
         71 |          1        0.01       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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