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

         p7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,987       69.87       69.87
          1 |         39        0.39       70.26
          2 |         63        0.63       70.89
          3 |         80        0.80       71.69
          4 |         67        0.67       72.36
          5 |         70        0.70       73.06
          6 |         68        0.68       73.74
          7 |         93        0.93       74.67
          8 |        100        1.00       75.67
          9 |        110        1.10       76.77
         10 |        131        1.31       78.08
         11 |         99        0.99       79.07
         12 |        129        1.29       80.36
         13 |        129        1.29       81.65
         14 |        141        1.41       83.06
         15 |        164        1.64       84.70
         16 |        137        1.37       86.07
         17 |        114        1.14       87.21
         18 |        134        1.34       88.55
         19 |        123        1.23       89.78
         20 |        122        1.22       91.00
         21 |        130        1.30       92.30
         22 |        113        1.13       93.43
         23 |         89        0.89       94.32
         24 |         81        0.81       95.13
         25 |         81        0.81       95.94
         26 |         59        0.59       96.53
         27 |         63        0.63       97.16
         28 |         53        0.53       97.69
         29 |         44        0.44       98.13
         30 |         23        0.23       98.36
         31 |         30        0.30       98.66
         32 |         21        0.21       98.87
         33 |         17        0.17       99.04
         34 |         18        0.18       99.22
         35 |         12        0.12       99.34
         36 |         14        0.14       99.48
         37 |         12        0.12       99.60
         38 |         11        0.11       99.71
         39 |          4        0.04       99.75
         40 |          6        0.06       99.81
         41 |          3        0.03       99.84
         42 |          3        0.03       99.87
         43 |          3        0.03       99.90
         44 |          4        0.04       99.94
         45 |          1        0.01       99.95
         48 |          1        0.01       99.96
         49 |          1        0.01       99.97
         53 |          1        0.01       99.98
         55 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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