Frequencies for first 10,000 rows of p4 variable in miper dataset :

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,354       73.54       73.54
          1 |         34        0.34       73.88
          2 |         55        0.55       74.43
          3 |         43        0.43       74.86
          4 |         50        0.50       75.36
          5 |         50        0.50       75.86
          6 |         61        0.61       76.47
          7 |         69        0.69       77.16
          8 |         79        0.79       77.95
          9 |         75        0.75       78.70
         10 |         85        0.85       79.55
         11 |        111        1.11       80.66
         12 |         99        0.99       81.65
         13 |        115        1.15       82.80
         14 |        125        1.25       84.05
         15 |        127        1.27       85.32
         16 |        108        1.08       86.40
         17 |        122        1.22       87.62
         18 |        122        1.22       88.84
         19 |        118        1.18       90.02
         20 |        111        1.11       91.13
         21 |        118        1.18       92.31
         22 |         94        0.94       93.25
         23 |         92        0.92       94.17
         24 |         96        0.96       95.13
         25 |         77        0.77       95.90
         26 |         67        0.67       96.57
         27 |         48        0.48       97.05
         28 |         58        0.58       97.63
         29 |         33        0.33       97.96
         30 |         38        0.38       98.34
         31 |         31        0.31       98.65
         32 |         22        0.22       98.87
         33 |         20        0.20       99.07
         34 |         16        0.16       99.23
         35 |          8        0.08       99.31
         36 |         17        0.17       99.48
         37 |         10        0.10       99.58
         38 |          5        0.05       99.63
         39 |          4        0.04       99.67
         40 |         11        0.11       99.78
         41 |          1        0.01       99.79
         42 |          3        0.03       99.82
         43 |          2        0.02       99.84
         44 |          7        0.07       99.91
         48 |          2        0.02       99.93
         50 |          1        0.01       99.94
         55 |          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