Frequencies for first 10,000 rows of prov6205 variable in pos2006 dataset :

 srv: icu - |
   surgical |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |      1,251       12.51       99.61
          1 |         37        0.37       99.98
          2 |          1        0.01       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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