Frequencies for first 10,000 rows of p3 variable in miper dataset :

         p3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,401       74.01       74.01
          1 |         32        0.32       74.33
          2 |         55        0.55       74.88
          3 |         48        0.48       75.36
          4 |         48        0.48       75.84
          5 |         51        0.51       76.35
          6 |         79        0.79       77.14
          7 |         79        0.79       77.93
          8 |         87        0.87       78.80
          9 |         84        0.84       79.64
         10 |         73        0.73       80.37
         11 |        100        1.00       81.37
         12 |         98        0.98       82.35
         13 |        113        1.13       83.48
         14 |        120        1.20       84.68
         15 |        117        1.17       85.85
         16 |        106        1.06       86.91
         17 |        112        1.12       88.03
         18 |        109        1.09       89.12
         19 |        116        1.16       90.28
         20 |        103        1.03       91.31
         21 |        117        1.17       92.48
         22 |         89        0.89       93.37
         23 |         84        0.84       94.21
         24 |         89        0.89       95.10
         25 |         57        0.57       95.67
         26 |         68        0.68       96.35
         27 |         60        0.60       96.95
         28 |         54        0.54       97.49
         29 |         35        0.35       97.84
         30 |         30        0.30       98.14
         31 |         33        0.33       98.47
         32 |         18        0.18       98.65
         33 |         21        0.21       98.86
         34 |         22        0.22       99.08
         35 |         17        0.17       99.25
         36 |         11        0.11       99.36
         37 |         14        0.14       99.50
         38 |         13        0.13       99.63
         39 |          8        0.08       99.71
         40 |          8        0.08       99.79
         41 |          5        0.05       99.84
         42 |          1        0.01       99.85
         43 |          3        0.03       99.88
         44 |          2        0.02       99.90
         45 |          3        0.03       99.93
         46 |          3        0.03       99.96
         53 |          1        0.01       99.97
         55 |          1        0.01       99.98
         56 |          1        0.01       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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