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

         p9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,125       61.25       61.25
          1 |         39        0.39       61.64
          2 |         78        0.78       62.42
          3 |         65        0.65       63.07
          4 |         77        0.77       63.84
          5 |         89        0.89       64.73
          6 |        112        1.12       65.85
          7 |        118        1.18       67.03
          8 |        126        1.26       68.29
          9 |        127        1.27       69.56
         10 |        140        1.40       70.96
         11 |        184        1.84       72.80
         12 |        183        1.83       74.63
         13 |        187        1.87       76.50
         14 |        172        1.72       78.22
         15 |        199        1.99       80.21
         16 |        181        1.81       82.02
         17 |        199        1.99       84.01
         18 |        188        1.88       85.89
         19 |        161        1.61       87.50
         20 |        152        1.52       89.02
         21 |        155        1.55       90.57
         22 |        142        1.42       91.99
         23 |        135        1.35       93.34
         24 |         98        0.98       94.32
         25 |         97        0.97       95.29
         26 |         74        0.74       96.03
         27 |         66        0.66       96.69
         28 |         61        0.61       97.30
         29 |         42        0.42       97.72
         30 |         45        0.45       98.17
         31 |         40        0.40       98.57
         32 |         19        0.19       98.76
         33 |         21        0.21       98.97
         34 |         19        0.19       99.16
         35 |         19        0.19       99.35
         36 |         10        0.10       99.45
         37 |          6        0.06       99.51
         38 |         13        0.13       99.64
         39 |          5        0.05       99.69
         40 |          5        0.05       99.74
         41 |          4        0.04       99.78
         42 |          3        0.03       99.81
         43 |          2        0.02       99.83
         44 |          3        0.03       99.86
         45 |          3        0.03       99.89
         47 |          2        0.02       99.91
         48 |          2        0.02       99.93
         49 |          1        0.01       99.94
         50 |          1        0.01       99.95
         52 |          3        0.03       99.98
         56 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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