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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,792       67.92       67.92
          1 |         27        0.27       68.19
          2 |         66        0.66       68.85
          3 |         74        0.74       69.59
          4 |         58        0.58       70.17
          5 |         71        0.71       70.88
          6 |         83        0.83       71.71
          7 |         86        0.86       72.57
          8 |         88        0.88       73.45
          9 |        101        1.01       74.46
         10 |        139        1.39       75.85
         11 |        123        1.23       77.08
         12 |        121        1.21       78.29
         13 |        137        1.37       79.66
         14 |        146        1.46       81.12
         15 |        151        1.51       82.63
         16 |        175        1.75       84.38
         17 |        146        1.46       85.84
         18 |        145        1.45       87.29
         19 |        132        1.32       88.61
         20 |        154        1.54       90.15
         21 |        129        1.29       91.44
         22 |        112        1.12       92.56
         23 |         86        0.86       93.42
         24 |         97        0.97       94.39
         25 |         89        0.89       95.28
         26 |         85        0.85       96.13
         27 |         53        0.53       96.66
         28 |         60        0.60       97.26
         29 |         47        0.47       97.73
         30 |         44        0.44       98.17
         31 |         39        0.39       98.56
         32 |         25        0.25       98.81
         33 |         19        0.19       99.00
         34 |         14        0.14       99.14
         35 |         10        0.10       99.24
         36 |         14        0.14       99.38
         37 |         12        0.12       99.50
         38 |         11        0.11       99.61
         39 |          8        0.08       99.69
         40 |          1        0.01       99.70
         41 |          5        0.05       99.75
         42 |          2        0.02       99.77
         43 |          4        0.04       99.81
         44 |          2        0.02       99.83
         45 |          3        0.03       99.86
         46 |          3        0.03       99.89
         47 |          3        0.03       99.92
         48 |          3        0.03       99.95
         50 |          2        0.02       99.97
         54 |          1        0.01       99.98
         56 |          1        0.01       99.99
         88 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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