Frequencies for first 10,000 rows of crnry_care_unit_srvc_cd variable in pos1993 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,856       88.56       88.56
          0 |        520        5.20       93.76
          1 |        599        5.99       99.75
          2 |         20        0.20       99.95
          3 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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