Frequencies for chainname variable in hcris2552_96_2000 dataset :

          chainname |      Freq.     Percent        Cum.
--------------------+-----------------------------------
                    |      6,194       99.98       99.98
CATHOLIC HEALTHCARE |          1        0.02      100.00
--------------------+-----------------------------------
              Total |      6,195      100.00

by Jean Roth , jroth@nber.org , 7 Sep 2018