Frequencies for first 10,000 rows of p7 variable in miper dataset :

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,438       74.38       74.38
          1 |         32        0.32       74.70
          2 |         65        0.65       75.35
          3 |         58        0.58       75.93
          4 |         57        0.57       76.50
          5 |         61        0.61       77.11
          6 |         76        0.76       77.87
          7 |         73        0.73       78.60
          8 |         97        0.97       79.57
          9 |        103        1.03       80.60
         10 |         84        0.84       81.44
         11 |        118        1.18       82.62
         12 |         97        0.97       83.59
         13 |        111        1.11       84.70
         14 |        110        1.10       85.80
         15 |        113        1.13       86.93
         16 |        108        1.08       88.01
         17 |        104        1.04       89.05
         18 |        113        1.13       90.18
         19 |        108        1.08       91.26
         20 |        102        1.02       92.28
         21 |        102        1.02       93.30
         22 |        100        1.00       94.30
         23 |         81        0.81       95.11
         24 |         68        0.68       95.79
         25 |         58        0.58       96.37
         26 |         58        0.58       96.95
         27 |         51        0.51       97.46
         28 |         33        0.33       97.79
         29 |         36        0.36       98.15
         30 |         41        0.41       98.56
         31 |         20        0.20       98.76
         32 |         25        0.25       99.01
         33 |         22        0.22       99.23
         34 |         15        0.15       99.38
         35 |         15        0.15       99.53
         36 |          7        0.07       99.60
         37 |          8        0.08       99.68
         38 |          6        0.06       99.74
         39 |         10        0.10       99.84
         40 |          3        0.03       99.87
         41 |          2        0.02       99.89
         42 |          2        0.02       99.91
         43 |          1        0.01       99.92
         44 |          3        0.03       99.95
         45 |          1        0.01       99.96
         46 |          3        0.03       99.99
         48 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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