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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,383       73.83       73.83
          1 |         46        0.46       74.29
          2 |         69        0.69       74.98
          3 |         64        0.64       75.62
          4 |         65        0.65       76.27
          5 |         66        0.66       76.93
          6 |         52        0.52       77.45
          7 |         71        0.71       78.16
          8 |         91        0.91       79.07
          9 |        114        1.14       80.21
         10 |         86        0.86       81.07
         11 |        113        1.13       82.20
         12 |        126        1.26       83.46
         13 |        104        1.04       84.50
         14 |        119        1.19       85.69
         15 |         97        0.97       86.66
         16 |        109        1.09       87.75
         17 |        140        1.40       89.15
         18 |        105        1.05       90.20
         19 |        121        1.21       91.41
         20 |         99        0.99       92.40
         21 |         89        0.89       93.29
         22 |         96        0.96       94.25
         23 |         81        0.81       95.06
         24 |         63        0.63       95.69
         25 |         88        0.88       96.57
         26 |         52        0.52       97.09
         27 |         52        0.52       97.61
         28 |         36        0.36       97.97
         29 |         31        0.31       98.28
         30 |         35        0.35       98.63
         31 |         21        0.21       98.84
         32 |         20        0.20       99.04
         33 |         12        0.12       99.16
         34 |         13        0.13       99.29
         35 |         11        0.11       99.40
         36 |          8        0.08       99.48
         37 |         10        0.10       99.58
         38 |          6        0.06       99.64
         39 |          9        0.09       99.73
         40 |          3        0.03       99.76
         41 |          7        0.07       99.83
         42 |          3        0.03       99.86
         44 |          1        0.01       99.87
         45 |          2        0.02       99.89
         46 |          2        0.02       99.91
         47 |          3        0.03       99.94
         48 |          1        0.01       99.95
         52 |          1        0.01       99.96
         53 |          1        0.01       99.97
         55 |          2        0.02       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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