Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2005 dataset :

 srv: icu - |
medical/sur |
      gical |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,731       87.31       87.31
          0 |        473        4.73       92.04
          1 |        753        7.53       99.57
          2 |         36        0.36       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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