Frequencies for first 10,000 rows of p2 variable in miper dataset :

         p2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,393       73.93       73.93
          1 |         33        0.33       74.26
          2 |         57        0.57       74.83
          3 |         52        0.52       75.35
          4 |         50        0.50       75.85
          5 |         58        0.58       76.43
          6 |         73        0.73       77.16
          7 |         74        0.74       77.90
          8 |         87        0.87       78.77
          9 |         91        0.91       79.68
         10 |         77        0.77       80.45
         11 |        106        1.06       81.51
         12 |         94        0.94       82.45
         13 |        108        1.08       83.53
         14 |        126        1.26       84.79
         15 |        118        1.18       85.97
         16 |        115        1.15       87.12
         17 |        107        1.07       88.19
         18 |        111        1.11       89.30
         19 |        111        1.11       90.41
         20 |        100        1.00       91.41
         21 |        112        1.12       92.53
         22 |         85        0.85       93.38
         23 |         84        0.84       94.22
         24 |         86        0.86       95.08
         25 |         59        0.59       95.67
         26 |         71        0.71       96.38
         27 |         56        0.56       96.94
         28 |         56        0.56       97.50
         29 |         37        0.37       97.87
         30 |         30        0.30       98.17
         31 |         31        0.31       98.48
         32 |         17        0.17       98.65
         33 |         22        0.22       98.87
         34 |         24        0.24       99.11
         35 |         16        0.16       99.27
         36 |          8        0.08       99.35
         37 |         15        0.15       99.50
         38 |         12        0.12       99.62
         39 |         11        0.11       99.73
         40 |          8        0.08       99.81
         41 |          7        0.07       99.88
         43 |          3        0.03       99.91
         44 |          2        0.02       99.93
         45 |          2        0.02       99.95
         46 |          3        0.03       99.98
         53 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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