Frequencies for first 10,000 rows of p9 variable in miper dataset :

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,513       75.13       75.13
          1 |         30        0.30       75.43
          2 |         64        0.64       76.07
          3 |         47        0.47       76.54
          4 |         62        0.62       77.16
          5 |         66        0.66       77.82
          6 |         73        0.73       78.55
          7 |         76        0.76       79.31
          8 |         86        0.86       80.17
          9 |         75        0.75       80.92
         10 |        107        1.07       81.99
         11 |         97        0.97       82.96
         12 |        105        1.05       84.01
         13 |        100        1.00       85.01
         14 |        122        1.22       86.23
         15 |        107        1.07       87.30
         16 |        121        1.21       88.51
         17 |        112        1.12       89.63
         18 |         91        0.91       90.54
         19 |        114        1.14       91.68
         20 |         94        0.94       92.62
         21 |         93        0.93       93.55
         22 |         89        0.89       94.44
         23 |         77        0.77       95.21
         24 |         59        0.59       95.80
         25 |         63        0.63       96.43
         26 |         70        0.70       97.13
         27 |         43        0.43       97.56
         28 |         45        0.45       98.01
         29 |         34        0.34       98.35
         30 |         31        0.31       98.66
         31 |         27        0.27       98.93
         32 |         25        0.25       99.18
         33 |         13        0.13       99.31
         34 |         10        0.10       99.41
         35 |          5        0.05       99.46
         36 |          5        0.05       99.51
         37 |          8        0.08       99.59
         38 |         12        0.12       99.71
         39 |          5        0.05       99.76
         40 |          4        0.04       99.80
         41 |          4        0.04       99.84
         42 |          3        0.03       99.87
         43 |          1        0.01       99.88
         44 |          4        0.04       99.92
         45 |          1        0.01       99.93
         46 |          1        0.01       99.94
         51 |          3        0.03       99.97
         56 |          1        0.01       99.98
         67 |          1        0.01       99.99
         77 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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