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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,512       75.12       75.12
          1 |         36        0.36       75.48
          2 |         68        0.68       76.16
          3 |         67        0.67       76.83
          4 |         61        0.61       77.44
          5 |         56        0.56       78.00
          6 |         63        0.63       78.63
          7 |         81        0.81       79.44
          8 |         82        0.82       80.26
          9 |         95        0.95       81.21
         10 |         83        0.83       82.04
         11 |        110        1.10       83.14
         12 |        114        1.14       84.28
         13 |        113        1.13       85.41
         14 |        122        1.22       86.63
         15 |         98        0.98       87.61
         16 |        118        1.18       88.79
         17 |        104        1.04       89.83
         18 |        116        1.16       90.99
         19 |         96        0.96       91.95
         20 |         91        0.91       92.86
         21 |         93        0.93       93.79
         22 |         77        0.77       94.56
         23 |         73        0.73       95.29
         24 |         69        0.69       95.98
         25 |         60        0.60       96.58
         26 |         69        0.69       97.27
         27 |         47        0.47       97.74
         28 |         36        0.36       98.10
         29 |         26        0.26       98.36
         30 |         29        0.29       98.65
         31 |         16        0.16       98.81
         32 |         23        0.23       99.04
         33 |         13        0.13       99.17
         34 |         14        0.14       99.31
         35 |          9        0.09       99.40
         36 |         11        0.11       99.51
         37 |          7        0.07       99.58
         38 |          6        0.06       99.64
         39 |          7        0.07       99.71
         40 |          6        0.06       99.77
         41 |          4        0.04       99.81
         42 |          5        0.05       99.86
         43 |          1        0.01       99.87
         44 |          4        0.04       99.91
         45 |          4        0.04       99.95
         46 |          1        0.01       99.96
         47 |          1        0.01       99.97
         49 |          1        0.01       99.98
         53 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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