Frequencies for first 10,000 rows of prov1080 variable in pos1991 dataset :

 volunteers |
    - other |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,876       98.76       98.76
        .12 |          1        0.01       98.77
        .25 |         10        0.10       98.87
         .5 |          8        0.08       98.95
        .75 |          3        0.03       98.98
          1 |          8        0.08       99.06
        1.2 |          1        0.01       99.07
       1.25 |          4        0.04       99.11
        1.5 |          7        0.07       99.18
       1.75 |          3        0.03       99.21
          2 |          6        0.06       99.27
        2.5 |          2        0.02       99.29
       2.75 |          1        0.01       99.30
          3 |          4        0.04       99.34
        3.5 |          1        0.01       99.35
       3.75 |          2        0.02       99.37
          4 |          3        0.03       99.40
        4.5 |          2        0.02       99.42
          5 |          9        0.09       99.51
          6 |          3        0.03       99.54
       6.25 |          1        0.01       99.55
          7 |          1        0.01       99.56
        7.5 |          1        0.01       99.57
          8 |          3        0.03       99.60
         10 |          2        0.02       99.62
         11 |          1        0.01       99.63
         12 |          2        0.02       99.65
         13 |          3        0.03       99.68
      13.25 |          1        0.01       99.69
         15 |          4        0.04       99.73
         17 |          1        0.01       99.74
         18 |          1        0.01       99.75
         20 |          3        0.03       99.78
         22 |          2        0.02       99.80
         25 |          1        0.01       99.81
         28 |          3        0.03       99.84
         33 |          2        0.02       99.86
         34 |          1        0.01       99.87
         35 |          1        0.01       99.88
      35.25 |          1        0.01       99.89
         44 |          1        0.01       99.90
         45 |          2        0.02       99.92
         48 |          2        0.02       99.94
         70 |          1        0.01       99.95
        101 |          1        0.01       99.96
        106 |          1        0.01       99.97
     124.75 |          1        0.01       99.98
        250 |          1        0.01       99.99
        280 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016