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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,312       73.12       73.12
          1 |         42        0.42       73.54
          2 |         64        0.64       74.18
          3 |         65        0.65       74.83
          4 |         63        0.63       75.46
          5 |         66        0.66       76.12
          6 |         59        0.59       76.71
          7 |         84        0.84       77.55
          8 |         94        0.94       78.49
          9 |         93        0.93       79.42
         10 |         96        0.96       80.38
         11 |         99        0.99       81.37
         12 |        121        1.21       82.58
         13 |        129        1.29       83.87
         14 |        118        1.18       85.05
         15 |        130        1.30       86.35
         16 |        110        1.10       87.45
         17 |        117        1.17       88.62
         18 |        118        1.18       89.80
         19 |        135        1.35       91.15
         20 |        111        1.11       92.26
         21 |        114        1.14       93.40
         22 |        100        1.00       94.40
         23 |         72        0.72       95.12
         24 |         64        0.64       95.76
         25 |         56        0.56       96.32
         26 |         55        0.55       96.87
         27 |         54        0.54       97.41
         28 |         43        0.43       97.84
         29 |         35        0.35       98.19
         30 |         26        0.26       98.45
         31 |         20        0.20       98.65
         32 |         25        0.25       98.90
         33 |         17        0.17       99.07
         34 |         16        0.16       99.23
         35 |         13        0.13       99.36
         36 |         10        0.10       99.46
         37 |          8        0.08       99.54
         38 |          7        0.07       99.61
         39 |          6        0.06       99.67
         40 |          5        0.05       99.72
         41 |          7        0.07       99.79
         42 |          4        0.04       99.83
         43 |          4        0.04       99.87
         44 |          2        0.02       99.89
         45 |          3        0.03       99.92
         46 |          3        0.03       99.95
         47 |          1        0.01       99.96
         48 |          1        0.01       99.97
         51 |          1        0.01       99.98
         52 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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