Frequencies for first 10,000 rows of crnry_care_unit_srvc_cd variable in pos2007 dataset :

 srv: icu - |
    cardiac |
(non-surgic |
        al) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |        757        7.57       94.39
          1 |        531        5.31       99.70
          2 |         26        0.26       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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