Frequencies for p8 variable in miper dataset :

         p8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        679       71.78       71.78
          1 |          1        0.11       71.88
          2 |         10        1.06       72.94
          3 |          7        0.74       73.68
          4 |          9        0.95       74.63
          5 |          9        0.95       75.58
          6 |          8        0.85       76.43
          7 |         10        1.06       77.48
          8 |          7        0.74       78.22
          9 |         10        1.06       79.28
         10 |         11        1.16       80.44
         11 |         12        1.27       81.71
         12 |         11        1.16       82.88
         13 |          9        0.95       83.83
         14 |         13        1.37       85.20
         15 |         11        1.16       86.36
         16 |         10        1.06       87.42
         17 |         11        1.16       88.58
         18 |         11        1.16       89.75
         19 |         12        1.27       91.01
         20 |         14        1.48       92.49
         21 |          4        0.42       92.92
         22 |          3        0.32       93.23
         23 |          9        0.95       94.19
         24 |          8        0.85       95.03
         25 |          4        0.42       95.45
         26 |          7        0.74       96.19
         27 |          2        0.21       96.41
         28 |          2        0.21       96.62
         29 |         10        1.06       97.67
         30 |          3        0.32       97.99
         31 |          1        0.11       98.10
         32 |          3        0.32       98.41
         33 |          3        0.32       98.73
         34 |          2        0.21       98.94
         35 |          3        0.32       99.26
         36 |          2        0.21       99.47
         38 |          1        0.11       99.58
         39 |          2        0.21       99.79
         40 |          2        0.21      100.00
------------+-----------------------------------
      Total |        946      100.00

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