Frequencies for first 10,000 rows of prov1515 variable in pos1993 dataset :

technologis |
ts - 2 year |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,919       99.19       99.19
          1 |         53        0.53       99.72
       1.25 |          1        0.01       99.73
        1.5 |          2        0.02       99.75
          2 |         15        0.15       99.90
          3 |          3        0.03       99.93
          4 |          2        0.02       99.95
          6 |          1        0.01       99.96
          7 |          2        0.02       99.98
          8 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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