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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,445       74.45       74.45
          1 |         31        0.31       74.76
          2 |         67        0.67       75.43
          3 |         53        0.53       75.96
          4 |         72        0.72       76.68
          5 |         52        0.52       77.20
          6 |         68        0.68       77.88
          7 |         85        0.85       78.73
          8 |         81        0.81       79.54
          9 |         85        0.85       80.39
         10 |         87        0.87       81.26
         11 |         92        0.92       82.18
         12 |        119        1.19       83.37
         13 |         88        0.88       84.25
         14 |        111        1.11       85.36
         15 |        116        1.16       86.52
         16 |        117        1.17       87.69
         17 |        105        1.05       88.74
         18 |        107        1.07       89.81
         19 |        103        1.03       90.84
         20 |        121        1.21       92.05
         21 |         92        0.92       92.97
         22 |         99        0.99       93.96
         23 |         77        0.77       94.73
         24 |         73        0.73       95.46
         25 |         67        0.67       96.13
         26 |         58        0.58       96.71
         27 |         54        0.54       97.25
         28 |         48        0.48       97.73
         29 |         41        0.41       98.14
         30 |         22        0.22       98.36
         31 |         18        0.18       98.54
         32 |         21        0.21       98.75
         33 |         26        0.26       99.01
         34 |         23        0.23       99.24
         35 |         18        0.18       99.42
         36 |          8        0.08       99.50
         37 |         13        0.13       99.63
         38 |          8        0.08       99.71
         39 |          4        0.04       99.75
         40 |          3        0.03       99.78
         41 |          5        0.05       99.83
         42 |          1        0.01       99.84
         43 |          6        0.06       99.90
         44 |          1        0.01       99.91
         45 |          3        0.03       99.94
         49 |          2        0.02       99.96
         51 |          1        0.01       99.97
         52 |          1        0.01       99.98
         55 |          1        0.01       99.99
         63 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016