Frequencies for first 10,000 rows of p1 variable in miper dataset :

         p1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,504       65.04       65.04
          1 |         30        0.30       65.34
          2 |         81        0.81       66.15
          3 |         71        0.71       66.86
          4 |         73        0.73       67.59
          5 |         88        0.88       68.47
          6 |         88        0.88       69.35
          7 |         96        0.96       70.31
          8 |         98        0.98       71.29
          9 |        124        1.24       72.53
         10 |        124        1.24       73.77
         11 |        140        1.40       75.17
         12 |        175        1.75       76.92
         13 |        163        1.63       78.55
         14 |        156        1.56       80.11
         15 |        174        1.74       81.85
         16 |        182        1.82       83.67
         17 |        160        1.60       85.27
         18 |        192        1.92       87.19
         19 |        141        1.41       88.60
         20 |        131        1.31       89.91
         21 |        129        1.29       91.20
         22 |        123        1.23       92.43
         23 |        100        1.00       93.43
         24 |         93        0.93       94.36
         25 |         76        0.76       95.12
         26 |         74        0.74       95.86
         27 |         73        0.73       96.59
         28 |         55        0.55       97.14
         29 |         42        0.42       97.56
         30 |         49        0.49       98.05
         31 |         44        0.44       98.49
         32 |         28        0.28       98.77
         33 |         28        0.28       99.05
         34 |         18        0.18       99.23
         35 |         10        0.10       99.33
         36 |         12        0.12       99.45
         37 |         14        0.14       99.59
         38 |         10        0.10       99.69
         39 |          7        0.07       99.76
         40 |          5        0.05       99.81
         41 |          7        0.07       99.88
         42 |          2        0.02       99.90
         43 |          3        0.03       99.93
         45 |          1        0.01       99.94
         48 |          2        0.02       99.96
         51 |          1        0.01       99.97
         52 |          1        0.01       99.98
         59 |          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