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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,570       65.70       65.70
          1 |         28        0.28       65.98
          2 |         68        0.68       66.66
          3 |         49        0.49       67.15
          4 |         83        0.83       67.98
          5 |         79        0.79       68.77
          6 |         80        0.80       69.57
          7 |        114        1.14       70.71
          8 |        103        1.03       71.74
          9 |        124        1.24       72.98
         10 |        116        1.16       74.14
         11 |        131        1.31       75.45
         12 |        143        1.43       76.88
         13 |        144        1.44       78.32
         14 |        183        1.83       80.15
         15 |        171        1.71       81.86
         16 |        176        1.76       83.62
         17 |        150        1.50       85.12
         18 |        181        1.81       86.93
         19 |        146        1.46       88.39
         20 |        144        1.44       89.83
         21 |        139        1.39       91.22
         22 |        141        1.41       92.63
         23 |        110        1.10       93.73
         24 |        125        1.25       94.98
         25 |         92        0.92       95.90
         26 |         83        0.83       96.73
         27 |         48        0.48       97.21
         28 |         41        0.41       97.62
         29 |         35        0.35       97.97
         30 |         30        0.30       98.27
         31 |         40        0.40       98.67
         32 |         28        0.28       98.95
         33 |         22        0.22       99.17
         34 |         16        0.16       99.33
         35 |         15        0.15       99.48
         36 |          9        0.09       99.57
         37 |          8        0.08       99.65
         38 |         10        0.10       99.75
         39 |          5        0.05       99.80
         40 |          5        0.05       99.85
         41 |          5        0.05       99.90
         42 |          2        0.02       99.92
         43 |          3        0.03       99.95
         48 |          1        0.01       99.96
         50 |          1        0.01       99.97
         53 |          2        0.02       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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