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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,968       69.68       69.68
          1 |         38        0.38       70.06
          2 |         72        0.72       70.78
          3 |         77        0.77       71.55
          4 |         78        0.78       72.33
          5 |         62        0.62       72.95
          6 |         81        0.81       73.76
          7 |         92        0.92       74.68
          8 |         86        0.86       75.54
          9 |        102        1.02       76.56
         10 |        119        1.19       77.75
         11 |        109        1.09       78.84
         12 |        129        1.29       80.13
         13 |        129        1.29       81.42
         14 |        152        1.52       82.94
         15 |        165        1.65       84.59
         16 |        138        1.38       85.97
         17 |        122        1.22       87.19
         18 |        140        1.40       88.59
         19 |        114        1.14       89.73
         20 |        123        1.23       90.96
         21 |        124        1.24       92.20
         22 |        109        1.09       93.29
         23 |         90        0.90       94.19
         24 |         93        0.93       95.12
         25 |         86        0.86       95.98
         26 |         60        0.60       96.58
         27 |         67        0.67       97.25
         28 |         50        0.50       97.75
         29 |         44        0.44       98.19
         30 |         30        0.30       98.49
         31 |         24        0.24       98.73
         32 |         25        0.25       98.98
         33 |         16        0.16       99.14
         34 |         20        0.20       99.34
         35 |         16        0.16       99.50
         36 |         14        0.14       99.64
         37 |          8        0.08       99.72
         38 |          7        0.07       99.79
         39 |          7        0.07       99.86
         40 |          4        0.04       99.90
         41 |          3        0.03       99.93
         43 |          2        0.02       99.95
         44 |          2        0.02       99.97
         46 |          1        0.01       99.98
         48 |          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