Frequencies for first 10,000 rows of prov1015 variable in pos1991 dataset :

      nurse |
practitione |
         rs |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,843       98.43       98.43
        .05 |          1        0.01       98.44
        .25 |          7        0.07       98.51
         .5 |         15        0.15       98.66
         .7 |          1        0.01       98.67
        .75 |          8        0.08       98.75
          1 |         99        0.99       99.74
       1.25 |          5        0.05       99.79
        1.5 |          2        0.02       99.81
       1.75 |          3        0.03       99.84
          2 |          8        0.08       99.92
       2.25 |          2        0.02       99.94
        2.5 |          1        0.01       99.95
        3.5 |          1        0.01       99.96
          4 |          1        0.01       99.97
          5 |          1        0.01       99.98
        7.5 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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