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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,584       75.84       75.84
          1 |         41        0.41       76.25
          2 |         67        0.67       76.92
          3 |         54        0.54       77.46
          4 |         54        0.54       78.00
          5 |         48        0.48       78.48
          6 |         73        0.73       79.21
          7 |         64        0.64       79.85
          8 |         84        0.84       80.69
          9 |         75        0.75       81.44
         10 |         87        0.87       82.31
         11 |         88        0.88       83.19
         12 |        119        1.19       84.38
         13 |         93        0.93       85.31
         14 |        120        1.20       86.51
         15 |        111        1.11       87.62
         16 |        103        1.03       88.65
         17 |        105        1.05       89.70
         18 |         96        0.96       90.66
         19 |         92        0.92       91.58
         20 |         78        0.78       92.36
         21 |         92        0.92       93.28
         22 |         96        0.96       94.24
         23 |         84        0.84       95.08
         24 |         72        0.72       95.80
         25 |         70        0.70       96.50
         26 |         62        0.62       97.12
         27 |         55        0.55       97.67
         28 |         34        0.34       98.01
         29 |         38        0.38       98.39
         30 |         25        0.25       98.64
         31 |         20        0.20       98.84
         32 |         20        0.20       99.04
         33 |         12        0.12       99.16
         34 |         17        0.17       99.33
         35 |         13        0.13       99.46
         36 |         15        0.15       99.61
         37 |         10        0.10       99.71
         38 |          5        0.05       99.76
         39 |          5        0.05       99.81
         40 |          3        0.03       99.84
         41 |          3        0.03       99.87
         42 |          2        0.02       99.89
         43 |          2        0.02       99.91
         44 |          1        0.01       99.92
         45 |          1        0.01       99.93
         48 |          1        0.01       99.94
         49 |          2        0.02       99.96
         50 |          1        0.01       99.97
         51 |          1        0.01       99.98
         52 |          1        0.01       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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