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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,614       66.14       66.14
          1 |         44        0.44       66.58
          2 |         80        0.80       67.38
          3 |         84        0.84       68.22
          4 |         68        0.68       68.90
          5 |         85        0.85       69.75
          6 |        103        1.03       70.78
          7 |         90        0.90       71.68
          8 |         91        0.91       72.59
          9 |        139        1.39       73.98
         10 |        129        1.29       75.27
         11 |        142        1.42       76.69
         12 |        129        1.29       77.98
         13 |        134        1.34       79.32
         14 |        154        1.54       80.86
         15 |        164        1.64       82.50
         16 |        173        1.73       84.23
         17 |        177        1.77       86.00
         18 |        153        1.53       87.53
         19 |        143        1.43       88.96
         20 |        154        1.54       90.50
         21 |        144        1.44       91.94
         22 |        120        1.20       93.14
         23 |        113        1.13       94.27
         24 |         88        0.88       95.15
         25 |         80        0.80       95.95
         26 |         65        0.65       96.60
         27 |         64        0.64       97.24
         28 |         58        0.58       97.82
         29 |         46        0.46       98.28
         30 |         45        0.45       98.73
         31 |         27        0.27       99.00
         32 |         19        0.19       99.19
         33 |         18        0.18       99.37
         34 |          4        0.04       99.41
         35 |         10        0.10       99.51
         36 |          7        0.07       99.58
         37 |          7        0.07       99.65
         38 |          6        0.06       99.71
         39 |          2        0.02       99.73
         40 |          5        0.05       99.78
         41 |          2        0.02       99.80
         42 |          5        0.05       99.85
         43 |          3        0.03       99.88
         44 |          4        0.04       99.92
         45 |          1        0.01       99.93
         46 |          2        0.02       99.95
         48 |          1        0.01       99.96
         52 |          1        0.01       99.97
         53 |          1        0.01       99.98
         56 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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