Frequencies for first 10,000 rows of prov1515 variable in pos2006 dataset :

technologis |
ts - 2 year |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,965       99.65       99.65
          1 |         21        0.21       99.86
       1.25 |          1        0.01       99.87
        1.5 |          1        0.01       99.88
          2 |          4        0.04       99.92
          3 |          2        0.02       99.94
          5 |          2        0.02       99.96
       7.75 |          1        0.01       99.97
          9 |          1        0.01       99.98
         14 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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