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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,150       71.50       71.50
          1 |         32        0.32       71.82
          2 |         78        0.78       72.60
          3 |         64        0.64       73.24
          4 |         68        0.68       73.92
          5 |         52        0.52       74.44
          6 |         63        0.63       75.07
          7 |         60        0.60       75.67
          8 |         95        0.95       76.62
          9 |         92        0.92       77.54
         10 |        116        1.16       78.70
         11 |        118        1.18       79.88
         12 |        133        1.33       81.21
         13 |        141        1.41       82.62
         14 |        115        1.15       83.77
         15 |        125        1.25       85.02
         16 |        128        1.28       86.30
         17 |        129        1.29       87.59
         18 |        122        1.22       88.81
         19 |        124        1.24       90.05
         20 |        123        1.23       91.28
         21 |         93        0.93       92.21
         22 |        108        1.08       93.29
         23 |         88        0.88       94.17
         24 |         99        0.99       95.16
         25 |         69        0.69       95.85
         26 |         66        0.66       96.51
         27 |         38        0.38       96.89
         28 |         43        0.43       97.32
         29 |         54        0.54       97.86
         30 |         43        0.43       98.29
         31 |         24        0.24       98.53
         32 |         31        0.31       98.84
         33 |         27        0.27       99.11
         34 |         18        0.18       99.29
         35 |         16        0.16       99.45
         36 |          8        0.08       99.53
         37 |          7        0.07       99.60
         38 |          9        0.09       99.69
         39 |          5        0.05       99.74
         40 |          7        0.07       99.81
         41 |          4        0.04       99.85
         42 |          3        0.03       99.88
         43 |          1        0.01       99.89
         44 |          2        0.02       99.91
         45 |          5        0.05       99.96
         46 |          1        0.01       99.97
         48 |          2        0.02       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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