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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,492       64.92       64.92
          1 |         32        0.32       65.24
          2 |         75        0.75       65.99
          3 |         64        0.64       66.63
          4 |         65        0.65       67.28
          5 |         88        0.88       68.16
          6 |         97        0.97       69.13
          7 |         99        0.99       70.12
          8 |        105        1.05       71.17
          9 |        131        1.31       72.48
         10 |        112        1.12       73.60
         11 |        148        1.48       75.08
         12 |        173        1.73       76.81
         13 |        155        1.55       78.36
         14 |        159        1.59       79.95
         15 |        190        1.90       81.85
         16 |        177        1.77       83.62
         17 |        172        1.72       85.34
         18 |        183        1.83       87.17
         19 |        136        1.36       88.53
         20 |        138        1.38       89.91
         21 |        135        1.35       91.26
         22 |        118        1.18       92.44
         23 |        105        1.05       93.49
         24 |         91        0.91       94.40
         25 |         80        0.80       95.20
         26 |         80        0.80       96.00
         27 |         63        0.63       96.63
         28 |         53        0.53       97.16
         29 |         43        0.43       97.59
         30 |         47        0.47       98.06
         31 |         44        0.44       98.50
         32 |         29        0.29       98.79
         33 |         29        0.29       99.08
         34 |         22        0.22       99.30
         35 |         10        0.10       99.40
         36 |         10        0.10       99.50
         37 |         12        0.12       99.62
         38 |         12        0.12       99.74
         39 |          6        0.06       99.80
         40 |          5        0.05       99.85
         41 |          6        0.06       99.91
         42 |          2        0.02       99.93
         43 |          2        0.02       99.95
         44 |          1        0.01       99.96
         45 |          1        0.01       99.97
         49 |          1        0.01       99.98
         59 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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