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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,379       73.79       73.79
          1 |         34        0.34       74.13
          2 |         55        0.55       74.68
          3 |         46        0.46       75.14
          4 |         49        0.49       75.63
          5 |         51        0.51       76.14
          6 |         59        0.59       76.73
          7 |         70        0.70       77.43
          8 |         63        0.63       78.06
          9 |         80        0.80       78.86
         10 |         88        0.88       79.74
         11 |         98        0.98       80.72
         12 |        100        1.00       81.72
         13 |        109        1.09       82.81
         14 |        124        1.24       84.05
         15 |        129        1.29       85.34
         16 |        118        1.18       86.52
         17 |        125        1.25       87.77
         18 |        123        1.23       89.00
         19 |        122        1.22       90.22
         20 |        116        1.16       91.38
         21 |        108        1.08       92.46
         22 |         98        0.98       93.44
         23 |         88        0.88       94.32
         24 |         88        0.88       95.20
         25 |         86        0.86       96.06
         26 |         72        0.72       96.78
         27 |         49        0.49       97.27
         28 |         54        0.54       97.81
         29 |         28        0.28       98.09
         30 |         40        0.40       98.49
         31 |         27        0.27       98.76
         32 |         18        0.18       98.94
         33 |         18        0.18       99.12
         34 |         14        0.14       99.26
         35 |          9        0.09       99.35
         36 |         15        0.15       99.50
         37 |         10        0.10       99.60
         38 |          6        0.06       99.66
         39 |          5        0.05       99.71
         40 |          7        0.07       99.78
         41 |          1        0.01       99.79
         42 |          2        0.02       99.81
         43 |          2        0.02       99.83
         44 |          7        0.07       99.90
         46 |          2        0.02       99.92
         48 |          2        0.02       99.94
         50 |          1        0.01       99.95
         67 |          1        0.01       99.96
         68 |          1        0.01       99.97
         79 |          1        0.01       99.98
         94 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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