Frequencies for first 10,000 rows of prov1515 variable in pos1998 dataset :

technologis |
ts - 2 year |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,904       99.04       99.04
          1 |         58        0.58       99.62
       1.25 |          1        0.01       99.63
        1.5 |          3        0.03       99.66
          2 |         18        0.18       99.84
          3 |          5        0.05       99.89
          4 |          3        0.03       99.92
          5 |          1        0.01       99.93
          6 |          1        0.01       99.94
          7 |          2        0.02       99.96
          8 |          1        0.01       99.97
          9 |          1        0.01       99.98
         14 |          1        0.01       99.99
         35 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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