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

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,405       74.05       74.05
          1 |         45        0.45       74.50
          2 |         63        0.63       75.13
          3 |         66        0.66       75.79
          4 |         63        0.63       76.42
          5 |         66        0.66       77.08
          6 |         70        0.70       77.78
          7 |         75        0.75       78.53
          8 |         81        0.81       79.34
          9 |         97        0.97       80.31
         10 |        101        1.01       81.32
         11 |        101        1.01       82.33
         12 |         88        0.88       83.21
         13 |        105        1.05       84.26
         14 |        124        1.24       85.50
         15 |        111        1.11       86.61
         16 |        129        1.29       87.90
         17 |        106        1.06       88.96
         18 |        113        1.13       90.09
         19 |        116        1.16       91.25
         20 |         97        0.97       92.22
         21 |         94        0.94       93.16
         22 |         92        0.92       94.08
         23 |         81        0.81       94.89
         24 |         77        0.77       95.66
         25 |         64        0.64       96.30
         26 |         64        0.64       96.94
         27 |         52        0.52       97.46
         28 |         39        0.39       97.85
         29 |         35        0.35       98.20
         30 |         31        0.31       98.51
         31 |         17        0.17       98.68
         32 |         21        0.21       98.89
         33 |         18        0.18       99.07
         34 |         16        0.16       99.23
         35 |          8        0.08       99.31
         36 |          9        0.09       99.40
         37 |         14        0.14       99.54
         38 |          7        0.07       99.61
         39 |          8        0.08       99.69
         40 |          7        0.07       99.76
         41 |          1        0.01       99.77
         42 |          4        0.04       99.81
         43 |          2        0.02       99.83
         44 |          1        0.01       99.84
         45 |          4        0.04       99.88
         46 |          1        0.01       99.89
         47 |          2        0.02       99.91
         48 |          1        0.01       99.92
         49 |          1        0.01       99.93
         51 |          1        0.01       99.94
         56 |          1        0.01       99.95
         58 |          1        0.01       99.96
         61 |          1        0.01       99.97
         65 |          1        0.01       99.98
         68 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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