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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,037       60.37       60.37
          1 |         36        0.36       60.73
          2 |         64        0.64       61.37
          3 |         68        0.68       62.05
          4 |         79        0.79       62.84
          5 |         71        0.71       63.55
          6 |         91        0.91       64.46
          7 |        114        1.14       65.60
          8 |        128        1.28       66.88
          9 |        139        1.39       68.27
         10 |        170        1.70       69.97
         11 |        157        1.57       71.54
         12 |        170        1.70       73.24
         13 |        152        1.52       74.76
         14 |        186        1.86       76.62
         15 |        188        1.88       78.50
         16 |        214        2.14       80.64
         17 |        186        1.86       82.50
         18 |        191        1.91       84.41
         19 |        189        1.89       86.30
         20 |        168        1.68       87.98
         21 |        147        1.47       89.45
         22 |        148        1.48       90.93
         23 |        134        1.34       92.27
         24 |        127        1.27       93.54
         25 |        106        1.06       94.60
         26 |         94        0.94       95.54
         27 |         73        0.73       96.27
         28 |         75        0.75       97.02
         29 |         53        0.53       97.55
         30 |         34        0.34       97.89
         31 |         35        0.35       98.24
         32 |         32        0.32       98.56
         33 |         27        0.27       98.83
         34 |         22        0.22       99.05
         35 |         19        0.19       99.24
         36 |         18        0.18       99.42
         37 |         13        0.13       99.55
         38 |         10        0.10       99.65
         39 |          6        0.06       99.71
         40 |          6        0.06       99.77
         41 |          6        0.06       99.83
         42 |          2        0.02       99.85
         43 |          4        0.04       99.89
         44 |          1        0.01       99.90
         45 |          2        0.02       99.92
         46 |          1        0.01       99.93
         47 |          2        0.02       99.95
         48 |          1        0.01       99.96
         52 |          2        0.02       99.98
         53 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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