Frequencies for first 10,000 rows of crdc_cthrtztn_prcdr_rooms_cnt variable in 

    Cardiac |
Catheteriza |
       tion |
  Procedure |
 Room Count |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,382       13.82       13.82
          1 |         52        0.52       14.34
          2 |         28        0.28       14.62
          3 |         13        0.13       14.75
          4 |          6        0.06       14.81
          5 |          7        0.07       14.88
          6 |          3        0.03       14.91
          7 |          3        0.03       14.94
          8 |          1        0.01       14.95
         30 |          1        0.01       14.96
          . |      8,504       85.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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