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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,356       63.56       63.56
          1 |         47        0.47       64.03
          2 |         73        0.73       64.76
          3 |         85        0.85       65.61
          4 |         66        0.66       66.27
          5 |         99        0.99       67.26
          6 |        100        1.00       68.26
          7 |        123        1.23       69.49
          8 |        108        1.08       70.57
          9 |        134        1.34       71.91
         10 |        111        1.11       73.02
         11 |        139        1.39       74.41
         12 |        146        1.46       75.87
         13 |        148        1.48       77.35
         14 |        169        1.69       79.04
         15 |        168        1.68       80.72
         16 |        191        1.91       82.63
         17 |        189        1.89       84.52
         18 |        168        1.68       86.20
         19 |        156        1.56       87.76
         20 |        158        1.58       89.34
         21 |        137        1.37       90.71
         22 |        141        1.41       92.12
         23 |        108        1.08       93.20
         24 |         92        0.92       94.12
         25 |         92        0.92       95.04
         26 |         88        0.88       95.92
         27 |         62        0.62       96.54
         28 |         72        0.72       97.26
         29 |         55        0.55       97.81
         30 |         32        0.32       98.13
         31 |         36        0.36       98.49
         32 |         33        0.33       98.82
         33 |         23        0.23       99.05
         34 |         23        0.23       99.28
         35 |         10        0.10       99.38
         36 |         11        0.11       99.49
         37 |         12        0.12       99.61
         38 |          1        0.01       99.62
         39 |          8        0.08       99.70
         40 |          5        0.05       99.75
         41 |          3        0.03       99.78
         42 |          2        0.02       99.80
         43 |          5        0.05       99.85
         44 |          2        0.02       99.87
         45 |          2        0.02       99.89
         46 |          1        0.01       99.90
         47 |          1        0.01       99.91
         48 |          1        0.01       99.92
         49 |          4        0.04       99.96
         51 |          1        0.01       99.97
         53 |          1        0.01       99.98
         58 |          1        0.01       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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