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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,453       64.53       64.53
          1 |         31        0.31       64.84
          2 |         80        0.80       65.64
          3 |         77        0.77       66.41
          4 |         77        0.77       67.18
          5 |         95        0.95       68.13
          6 |         84        0.84       68.97
          7 |        119        1.19       70.16
          8 |        120        1.20       71.36
          9 |        137        1.37       72.73
         10 |        116        1.16       73.89
         11 |        151        1.51       75.40
         12 |        176        1.76       77.16
         13 |        147        1.47       78.63
         14 |        175        1.75       80.38
         15 |        174        1.74       82.12
         16 |        167        1.67       83.79
         17 |        165        1.65       85.44
         18 |        183        1.83       87.27
         19 |        144        1.44       88.71
         20 |        141        1.41       90.12
         21 |        131        1.31       91.43
         22 |        121        1.21       92.64
         23 |        106        1.06       93.70
         24 |         85        0.85       94.55
         25 |         74        0.74       95.29
         26 |         87        0.87       96.16
         27 |         63        0.63       96.79
         28 |         53        0.53       97.32
         29 |         38        0.38       97.70
         30 |         49        0.49       98.19
         31 |         46        0.46       98.65
         32 |         21        0.21       98.86
         33 |         30        0.30       99.16
         34 |         20        0.20       99.36
         35 |         11        0.11       99.47
         36 |          7        0.07       99.54
         37 |         12        0.12       99.66
         38 |          9        0.09       99.75
         39 |          7        0.07       99.82
         40 |          4        0.04       99.86
         41 |          5        0.05       99.91
         42 |          3        0.03       99.94
         43 |          2        0.02       99.96
         45 |          2        0.02       99.98
         59 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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