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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,346       73.46       73.46
          1 |         43        0.43       73.89
          2 |         52        0.52       74.41
          3 |         62        0.62       75.03
          4 |         57        0.57       75.60
          5 |         64        0.64       76.24
          6 |         57        0.57       76.81
          7 |         79        0.79       77.60
          8 |         78        0.78       78.38
          9 |         83        0.83       79.21
         10 |         93        0.93       80.14
         11 |        120        1.20       81.34
         12 |         98        0.98       82.32
         13 |        118        1.18       83.50
         14 |        109        1.09       84.59
         15 |        109        1.09       85.68
         16 |        126        1.26       86.94
         17 |        110        1.10       88.04
         18 |        107        1.07       89.11
         19 |        131        1.31       90.42
         20 |         93        0.93       91.35
         21 |        105        1.05       92.40
         22 |        116        1.16       93.56
         23 |        101        1.01       94.57
         24 |         86        0.86       95.43
         25 |         67        0.67       96.10
         26 |         60        0.60       96.70
         27 |         54        0.54       97.24
         28 |         66        0.66       97.90
         29 |         30        0.30       98.20
         30 |         31        0.31       98.51
         31 |         31        0.31       98.82
         32 |         18        0.18       99.00
         33 |         13        0.13       99.13
         34 |         10        0.10       99.23
         35 |          9        0.09       99.32
         36 |         12        0.12       99.44
         37 |          8        0.08       99.52
         38 |         13        0.13       99.65
         39 |          5        0.05       99.70
         40 |          5        0.05       99.75
         41 |          4        0.04       99.79
         42 |          4        0.04       99.83
         43 |          2        0.02       99.85
         44 |          3        0.03       99.88
         45 |          3        0.03       99.91
         46 |          1        0.01       99.92
         47 |          1        0.01       99.93
         48 |          1        0.01       99.94
         49 |          1        0.01       99.95
         50 |          1        0.01       99.96
         51 |          1        0.01       99.97
         52 |          1        0.01       99.98
         55 |          1        0.01       99.99
         78 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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