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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,492       74.92       74.92
          1 |         38        0.38       75.30
          2 |         58        0.58       75.88
          3 |         46        0.46       76.34
          4 |         67        0.67       77.01
          5 |         64        0.64       77.65
          6 |         72        0.72       78.37
          7 |         57        0.57       78.94
          8 |         66        0.66       79.60
          9 |         79        0.79       80.39
         10 |         68        0.68       81.07
         11 |         92        0.92       81.99
         12 |         79        0.79       82.78
         13 |         83        0.83       83.61
         14 |        101        1.01       84.62
         15 |        101        1.01       85.63
         16 |        131        1.31       86.94
         17 |        116        1.16       88.10
         18 |        125        1.25       89.35
         19 |        116        1.16       90.51
         20 |         96        0.96       91.47
         21 |        108        1.08       92.55
         22 |         83        0.83       93.38
         23 |         99        0.99       94.37
         24 |         75        0.75       95.12
         25 |         80        0.80       95.92
         26 |         54        0.54       96.46
         27 |         55        0.55       97.01
         28 |         51        0.51       97.52
         29 |         46        0.46       97.98
         30 |         32        0.32       98.30
         31 |         32        0.32       98.62
         32 |         28        0.28       98.90
         33 |         16        0.16       99.06
         34 |         19        0.19       99.25
         35 |         14        0.14       99.39
         36 |         14        0.14       99.53
         37 |          7        0.07       99.60
         38 |          8        0.08       99.68
         39 |          8        0.08       99.76
         40 |          3        0.03       99.79
         41 |          1        0.01       99.80
         42 |          3        0.03       99.83
         44 |          1        0.01       99.84
         45 |          3        0.03       99.87
         46 |          2        0.02       99.89
         47 |          2        0.02       99.91
         48 |          1        0.01       99.92
         49 |          1        0.01       99.93
         51 |          1        0.01       99.94
         54 |          2        0.02       99.96
         58 |          1        0.01       99.97
         60 |          1        0.01       99.98
         62 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016