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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,959       59.59       59.59
          1 |         22        0.22       59.81
          2 |         72        0.72       60.53
          3 |         63        0.63       61.16
          4 |         72        0.72       61.88
          5 |         78        0.78       62.66
          6 |        100        1.00       63.66
          7 |        124        1.24       64.90
          8 |        135        1.35       66.25
          9 |        137        1.37       67.62
         10 |        154        1.54       69.16
         11 |        148        1.48       70.64
         12 |        195        1.95       72.59
         13 |        169        1.69       74.28
         14 |        172        1.72       76.00
         15 |        185        1.85       77.85
         16 |        217        2.17       80.02
         17 |        215        2.15       82.17
         18 |        176        1.76       83.93
         19 |        169        1.69       85.62
         20 |        167        1.67       87.29
         21 |        164        1.64       88.93
         22 |        162        1.62       90.55
         23 |        156        1.56       92.11
         24 |        135        1.35       93.46
         25 |        112        1.12       94.58
         26 |         85        0.85       95.43
         27 |         71        0.71       96.14
         28 |         60        0.60       96.74
         29 |         55        0.55       97.29
         30 |         48        0.48       97.77
         31 |         42        0.42       98.19
         32 |         27        0.27       98.46
         33 |         27        0.27       98.73
         34 |         23        0.23       98.96
         35 |         19        0.19       99.15
         36 |         17        0.17       99.32
         37 |         15        0.15       99.47
         38 |         11        0.11       99.58
         39 |          9        0.09       99.67
         40 |          5        0.05       99.72
         41 |          6        0.06       99.78
         42 |          4        0.04       99.82
         43 |          3        0.03       99.85
         44 |          2        0.02       99.87
         45 |          1        0.01       99.88
         46 |          2        0.02       99.90
         47 |          1        0.01       99.91
         48 |          1        0.01       99.92
         49 |          1        0.01       99.93
         50 |          1        0.01       99.94
         51 |          1        0.01       99.95
         53 |          1        0.01       99.96
         54 |          1        0.01       99.97
         56 |          1        0.01       99.98
         69 |          1        0.01       99.99
         71 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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