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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,457       74.57       74.57
          1 |         45        0.45       75.02
          2 |         58        0.58       75.60
          3 |         35        0.35       75.95
          4 |         50        0.50       76.45
          5 |         60        0.60       77.05
          6 |         54        0.54       77.59
          7 |         53        0.53       78.12
          8 |         68        0.68       78.80
          9 |         82        0.82       79.62
         10 |         81        0.81       80.43
         11 |         95        0.95       81.38
         12 |         97        0.97       82.35
         13 |        107        1.07       83.42
         14 |        102        1.02       84.44
         15 |        127        1.27       85.71
         16 |        122        1.22       86.93
         17 |        105        1.05       87.98
         18 |        102        1.02       89.00
         19 |        133        1.33       90.33
         20 |         98        0.98       91.31
         21 |        107        1.07       92.38
         22 |         99        0.99       93.37
         23 |         95        0.95       94.32
         24 |         85        0.85       95.17
         25 |         69        0.69       95.86
         26 |         60        0.60       96.46
         27 |         52        0.52       96.98
         28 |         43        0.43       97.41
         29 |         35        0.35       97.76
         30 |         44        0.44       98.20
         31 |         30        0.30       98.50
         32 |         16        0.16       98.66
         33 |         19        0.19       98.85
         34 |         21        0.21       99.06
         35 |         18        0.18       99.24
         36 |         14        0.14       99.38
         37 |          9        0.09       99.47
         38 |          9        0.09       99.56
         39 |          6        0.06       99.62
         40 |          7        0.07       99.69
         41 |          7        0.07       99.76
         42 |          6        0.06       99.82
         43 |          4        0.04       99.86
         44 |          3        0.03       99.89
         45 |          2        0.02       99.91
         46 |          1        0.01       99.92
         47 |          2        0.02       99.94
         50 |          1        0.01       99.95
         51 |          1        0.01       99.96
         54 |          1        0.01       99.97
         60 |          1        0.01       99.98
         63 |          1        0.01       99.99
         65 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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