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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,350       73.50       73.50
          1 |         36        0.36       73.86
          2 |         64        0.64       74.50
          3 |         54        0.54       75.04
          4 |         55        0.55       75.59
          5 |         64        0.64       76.23
          6 |         64        0.64       76.87
          7 |         76        0.76       77.63
          8 |         81        0.81       78.44
          9 |         82        0.82       79.26
         10 |        100        1.00       80.26
         11 |        113        1.13       81.39
         12 |        127        1.27       82.66
         13 |        128        1.28       83.94
         14 |        117        1.17       85.11
         15 |        128        1.28       86.39
         16 |        112        1.12       87.51
         17 |        125        1.25       88.76
         18 |        120        1.20       89.96
         19 |        108        1.08       91.04
         20 |        109        1.09       92.13
         21 |        109        1.09       93.22
         22 |         81        0.81       94.03
         23 |         79        0.79       94.82
         24 |         70        0.70       95.52
         25 |         62        0.62       96.14
         26 |         58        0.58       96.72
         27 |         47        0.47       97.19
         28 |         50        0.50       97.69
         29 |         44        0.44       98.13
         30 |         38        0.38       98.51
         31 |         22        0.22       98.73
         32 |         17        0.17       98.90
         33 |         19        0.19       99.09
         34 |         22        0.22       99.31
         35 |         16        0.16       99.47
         36 |         13        0.13       99.60
         37 |          3        0.03       99.63
         38 |          8        0.08       99.71
         39 |          6        0.06       99.77
         40 |          4        0.04       99.81
         41 |          4        0.04       99.85
         42 |          1        0.01       99.86
         43 |          5        0.05       99.91
         45 |          3        0.03       99.94
         46 |          1        0.01       99.95
         49 |          3        0.03       99.98
         55 |          1        0.01       99.99
         76 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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