Frequencies for first 10,000 rows of tchnlgst_2_yr_rdlgc_cnt variable in pos1996 dataset :

technologis |
ts - 2 year |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,913       99.13       99.13
          1 |         55        0.55       99.68
       1.25 |          1        0.01       99.69
        1.5 |          3        0.03       99.72
          2 |         18        0.18       99.90
          3 |          2        0.02       99.92
          4 |          2        0.02       99.94
          6 |          1        0.01       99.95
          7 |          2        0.02       99.97
          8 |          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