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

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,803       88.03       88.03
          0 |        603        6.03       94.06
          1 |        566        5.66       99.72
          2 |         24        0.24       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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