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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,562       75.62       75.62
          1 |         35        0.35       75.97
          2 |         67        0.67       76.64
          3 |         54        0.54       77.18
          4 |         51        0.51       77.69
          5 |         63        0.63       78.32
          6 |         63        0.63       78.95
          7 |         62        0.62       79.57
          8 |         75        0.75       80.32
          9 |         83        0.83       81.15
         10 |         93        0.93       82.08
         11 |         88        0.88       82.96
         12 |        112        1.12       84.08
         13 |         91        0.91       84.99
         14 |        108        1.08       86.07
         15 |        117        1.17       87.24
         16 |        119        1.19       88.43
         17 |        109        1.09       89.52
         18 |        132        1.32       90.84
         19 |         88        0.88       91.72
         20 |         87        0.87       92.59
         21 |         96        0.96       93.55
         22 |         84        0.84       94.39
         23 |         68        0.68       95.07
         24 |         72        0.72       95.79
         25 |         52        0.52       96.31
         26 |         46        0.46       96.77
         27 |         59        0.59       97.36
         28 |         41        0.41       97.77
         29 |         32        0.32       98.09
         30 |         30        0.30       98.39
         31 |         27        0.27       98.66
         32 |         27        0.27       98.93
         33 |         14        0.14       99.07
         34 |         13        0.13       99.20
         35 |         10        0.10       99.30
         36 |          4        0.04       99.34
         37 |         10        0.10       99.44
         38 |          9        0.09       99.53
         39 |          5        0.05       99.58
         40 |          8        0.08       99.66
         41 |          4        0.04       99.70
         42 |          3        0.03       99.73
         43 |          1        0.01       99.74
         44 |          2        0.02       99.76
         45 |          6        0.06       99.82
         46 |          1        0.01       99.83
         47 |          5        0.05       99.88
         48 |          4        0.04       99.92
         49 |          2        0.02       99.94
         50 |          1        0.01       99.95
         51 |          1        0.01       99.96
         53 |          1        0.01       99.97
         55 |          1        0.01       99.98
         58 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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