Frequencies for first 10,000 rows of tchnlgst_2_yr_rdlgc_cnt variable in pos2000 dataset :

technologis |
ts - 2 year |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,968       99.68       99.68
          1 |         20        0.20       99.88
       1.25 |          1        0.01       99.89
        1.5 |          1        0.01       99.90
          2 |          6        0.06       99.96
          3 |          1        0.01       99.97
          5 |          1        0.01       99.98
          9 |          1        0.01       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017