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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,565       65.65       65.65
          1 |         26        0.26       65.91
          2 |         72        0.72       66.63
          3 |         62        0.62       67.25
          4 |         76        0.76       68.01
          5 |         67        0.67       68.68
          6 |         91        0.91       69.59
          7 |        108        1.08       70.67
          8 |        108        1.08       71.75
          9 |        127        1.27       73.02
         10 |        114        1.14       74.16
         11 |        136        1.36       75.52
         12 |        155        1.55       77.07
         13 |        145        1.45       78.52
         14 |        173        1.73       80.25
         15 |        164        1.64       81.89
         16 |        166        1.66       83.55
         17 |        152        1.52       85.07
         18 |        179        1.79       86.86
         19 |        157        1.57       88.43
         20 |        144        1.44       89.87
         21 |        132        1.32       91.19
         22 |        136        1.36       92.55
         23 |         99        0.99       93.54
         24 |        123        1.23       94.77
         25 |         86        0.86       95.63
         26 |         89        0.89       96.52
         27 |         53        0.53       97.05
         28 |         48        0.48       97.53
         29 |         36        0.36       97.89
         30 |         32        0.32       98.21
         31 |         42        0.42       98.63
         32 |         27        0.27       98.90
         33 |         27        0.27       99.17
         34 |         14        0.14       99.31
         35 |         11        0.11       99.42
         36 |         10        0.10       99.52
         37 |          8        0.08       99.60
         38 |          9        0.09       99.69
         39 |          7        0.07       99.76
         40 |          5        0.05       99.81
         41 |          2        0.02       99.83
         42 |          2        0.02       99.85
         43 |          4        0.04       99.89
         45 |          1        0.01       99.90
         46 |          1        0.01       99.91
         48 |          3        0.03       99.94
         50 |          2        0.02       99.96
         53 |          2        0.02       99.98
         58 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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