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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,599       65.99       65.99
          1 |         33        0.33       66.32
          2 |         66        0.66       66.98
          3 |         71        0.71       67.69
          4 |         70        0.70       68.39
          5 |         77        0.77       69.16
          6 |         75        0.75       69.91
          7 |        109        1.09       71.00
          8 |        107        1.07       72.07
          9 |        129        1.29       73.36
         10 |        127        1.27       74.63
         11 |        126        1.26       75.89
         12 |        134        1.34       77.23
         13 |        164        1.64       78.87
         14 |        169        1.69       80.56
         15 |        161        1.61       82.17
         16 |        167        1.67       83.84
         17 |        137        1.37       85.21
         18 |        141        1.41       86.62
         19 |        135        1.35       87.97
         20 |        148        1.48       89.45
         21 |        150        1.50       90.95
         22 |        131        1.31       92.26
         23 |        106        1.06       93.32
         24 |        105        1.05       94.37
         25 |         94        0.94       95.31
         26 |         82        0.82       96.13
         27 |         76        0.76       96.89
         28 |         61        0.61       97.50
         29 |         48        0.48       97.98
         30 |         27        0.27       98.25
         31 |         23        0.23       98.48
         32 |         29        0.29       98.77
         33 |         24        0.24       99.01
         34 |         22        0.22       99.23
         35 |          9        0.09       99.32
         36 |         13        0.13       99.45
         37 |          9        0.09       99.54
         38 |         11        0.11       99.65
         39 |          8        0.08       99.73
         40 |          6        0.06       99.79
         41 |          6        0.06       99.85
         42 |          2        0.02       99.87
         43 |          1        0.01       99.88
         44 |          1        0.01       99.89
         45 |          6        0.06       99.95
         49 |          1        0.01       99.96
         56 |          1        0.01       99.97
         59 |          1        0.01       99.98
         74 |          1        0.01       99.99
         80 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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