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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,531       75.31       75.31
          1 |         49        0.49       75.80
          2 |         56        0.56       76.36
          3 |         38        0.38       76.74
          4 |         56        0.56       77.30
          5 |         43        0.43       77.73
          6 |         55        0.55       78.28
          7 |         68        0.68       78.96
          8 |         85        0.85       79.81
          9 |         68        0.68       80.49
         10 |        111        1.11       81.60
         11 |         81        0.81       82.41
         12 |         94        0.94       83.35
         13 |        114        1.14       84.49
         14 |        126        1.26       85.75
         15 |        114        1.14       86.89
         16 |        121        1.21       88.10
         17 |        107        1.07       89.17
         18 |        113        1.13       90.30
         19 |        101        1.01       91.31
         20 |        118        1.18       92.49
         21 |         93        0.93       93.42
         22 |         73        0.73       94.15
         23 |         56        0.56       94.71
         24 |         82        0.82       95.53
         25 |         64        0.64       96.17
         26 |         51        0.51       96.68
         27 |         48        0.48       97.16
         28 |         49        0.49       97.65
         29 |         39        0.39       98.04
         30 |         34        0.34       98.38
         31 |         29        0.29       98.67
         32 |         26        0.26       98.93
         33 |         17        0.17       99.10
         34 |         10        0.10       99.20
         35 |         13        0.13       99.33
         36 |         10        0.10       99.43
         37 |          7        0.07       99.50
         38 |          5        0.05       99.55
         39 |          6        0.06       99.61
         40 |         10        0.10       99.71
         41 |          4        0.04       99.75
         42 |          4        0.04       99.79
         43 |          2        0.02       99.81
         44 |          3        0.03       99.84
         45 |          3        0.03       99.87
         46 |          2        0.02       99.89
         47 |          2        0.02       99.91
         48 |          3        0.03       99.94
         50 |          1        0.01       99.95
         51 |          1        0.01       99.96
         53 |          3        0.03       99.99
         65 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016