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

         p4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,391       73.91       73.91
          1 |         31        0.31       74.22
          2 |         71        0.71       74.93
          3 |         55        0.55       75.48
          4 |         62        0.62       76.10
          5 |         54        0.54       76.64
          6 |         73        0.73       77.37
          7 |         78        0.78       78.15
          8 |        104        1.04       79.19
          9 |         97        0.97       80.16
         10 |         84        0.84       81.00
         11 |        115        1.15       82.15
         12 |        103        1.03       83.18
         13 |        113        1.13       84.31
         14 |        103        1.03       85.34
         15 |        127        1.27       86.61
         16 |        100        1.00       87.61
         17 |        111        1.11       88.72
         18 |        120        1.20       89.92
         19 |        109        1.09       91.01
         20 |        107        1.07       92.08
         21 |        109        1.09       93.17
         22 |         80        0.80       93.97
         23 |         76        0.76       94.73
         24 |         69        0.69       95.42
         25 |         60        0.60       96.02
         26 |         63        0.63       96.65
         27 |         52        0.52       97.17
         28 |         33        0.33       97.50
         29 |         39        0.39       97.89
         30 |         52        0.52       98.41
         31 |         27        0.27       98.68
         32 |         24        0.24       98.92
         33 |         27        0.27       99.19
         34 |         13        0.13       99.32
         35 |         15        0.15       99.47
         36 |         14        0.14       99.61
         37 |          9        0.09       99.70
         38 |          8        0.08       99.78
         39 |          5        0.05       99.83
         40 |          4        0.04       99.87
         41 |          2        0.02       99.89
         42 |          3        0.03       99.92
         43 |          1        0.01       99.93
         44 |          2        0.02       99.95
         45 |          1        0.01       99.96
         46 |          2        0.02       99.98
         50 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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