Frequencies for first 10,000 rows of p7 variable in miper dataset :

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,626       66.26       66.26
          1 |         33        0.33       66.59
          2 |         63        0.63       67.22
          3 |         65        0.65       67.87
          4 |         73        0.73       68.60
          5 |         76        0.76       69.36
          6 |         76        0.76       70.12
          7 |        102        1.02       71.14
          8 |        113        1.13       72.27
          9 |        128        1.28       73.55
         10 |        117        1.17       74.72
         11 |        131        1.31       76.03
         12 |        150        1.50       77.53
         13 |        161        1.61       79.14
         14 |        163        1.63       80.77
         15 |        154        1.54       82.31
         16 |        170        1.70       84.01
         17 |        153        1.53       85.54
         18 |        152        1.52       87.06
         19 |        136        1.36       88.42
         20 |        140        1.40       89.82
         21 |        154        1.54       91.36
         22 |        125        1.25       92.61
         23 |        102        1.02       93.63
         24 |         98        0.98       94.61
         25 |         89        0.89       95.50
         26 |         72        0.72       96.22
         27 |         75        0.75       96.97
         28 |         59        0.59       97.56
         29 |         44        0.44       98.00
         30 |         28        0.28       98.28
         31 |         25        0.25       98.53
         32 |         31        0.31       98.84
         33 |         20        0.20       99.04
         34 |         14        0.14       99.18
         35 |         12        0.12       99.30
         36 |         11        0.11       99.41
         37 |         10        0.10       99.51
         38 |         13        0.13       99.64
         39 |          9        0.09       99.73
         40 |          6        0.06       99.79
         41 |          4        0.04       99.83
         42 |          1        0.01       99.84
         43 |          4        0.04       99.88
         44 |          2        0.02       99.90
         45 |          1        0.01       99.91
         46 |          1        0.01       99.92
         47 |          2        0.02       99.94
         49 |          2        0.02       99.96
         50 |          1        0.01       99.97
         56 |          1        0.01       99.98
         59 |          1        0.01       99.99
         80 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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