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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,395       73.95       73.95
          1 |         48        0.48       74.43
          2 |         48        0.48       74.91
          3 |         58        0.58       75.49
          4 |         76        0.76       76.25
          5 |         72        0.72       76.97
          6 |         70        0.70       77.67
          7 |         73        0.73       78.40
          8 |         72        0.72       79.12
          9 |         96        0.96       80.08
         10 |        105        1.05       81.13
         11 |        112        1.12       82.25
         12 |        111        1.11       83.36
         13 |        112        1.12       84.48
         14 |        108        1.08       85.56
         15 |        117        1.17       86.73
         16 |        124        1.24       87.97
         17 |         94        0.94       88.91
         18 |         99        0.99       89.90
         19 |        103        1.03       90.93
         20 |        108        1.08       92.01
         21 |        123        1.23       93.24
         22 |        107        1.07       94.31
         23 |         82        0.82       95.13
         24 |         72        0.72       95.85
         25 |         73        0.73       96.58
         26 |         59        0.59       97.17
         27 |         56        0.56       97.73
         28 |         32        0.32       98.05
         29 |         38        0.38       98.43
         30 |         25        0.25       98.68
         31 |         21        0.21       98.89
         32 |         16        0.16       99.05
         33 |         12        0.12       99.17
         34 |         13        0.13       99.30
         35 |         12        0.12       99.42
         36 |          9        0.09       99.51
         37 |          7        0.07       99.58
         38 |          9        0.09       99.67
         39 |          7        0.07       99.74
         40 |          1        0.01       99.75
         41 |          6        0.06       99.81
         42 |          5        0.05       99.86
         43 |          2        0.02       99.88
         45 |          2        0.02       99.90
         46 |          2        0.02       99.92
         47 |          1        0.01       99.93
         48 |          1        0.01       99.94
         49 |          1        0.01       99.95
         50 |          1        0.01       99.96
         52 |          1        0.01       99.97
         54 |          1        0.01       99.98
         57 |          1        0.01       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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