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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,460       74.60       74.60
          1 |         33        0.33       74.93
          2 |         68        0.68       75.61
          3 |         57        0.57       76.18
          4 |         60        0.60       76.78
          5 |         63        0.63       77.41
          6 |         67        0.67       78.08
          7 |         83        0.83       78.91
          8 |         94        0.94       79.85
          9 |         95        0.95       80.80
         10 |         80        0.80       81.60
         11 |        117        1.17       82.77
         12 |         96        0.96       83.73
         13 |        102        1.02       84.75
         14 |        111        1.11       85.86
         15 |        118        1.18       87.04
         16 |         99        0.99       88.03
         17 |        111        1.11       89.14
         18 |        120        1.20       90.34
         19 |        118        1.18       91.52
         20 |        107        1.07       92.59
         21 |        103        1.03       93.62
         22 |         79        0.79       94.41
         23 |         77        0.77       95.18
         24 |         62        0.62       95.80
         25 |         56        0.56       96.36
         26 |         55        0.55       96.91
         27 |         41        0.41       97.32
         28 |         38        0.38       97.70
         29 |         40        0.40       98.10
         30 |         38        0.38       98.48
         31 |         28        0.28       98.76
         32 |         28        0.28       99.04
         33 |         27        0.27       99.31
         34 |         11        0.11       99.42
         35 |         11        0.11       99.53
         36 |          7        0.07       99.60
         37 |          4        0.04       99.64
         38 |         10        0.10       99.74
         39 |          6        0.06       99.80
         40 |          3        0.03       99.83
         41 |          3        0.03       99.86
         42 |          5        0.05       99.91
         44 |          3        0.03       99.94
         46 |          2        0.02       99.96
         47 |          1        0.01       99.97
         50 |          1        0.01       99.98
         51 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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