Frequencies for gi_copd_asp_spec_bact_pneum variable in hcccoefn dataset :

gi_copd_asp |
_spec_bact_ |
      pneum |      Freq.     Percent        Cum.
------------+-----------------------------------
        .22 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

by Jean Roth , jroth@nber.org , 7 Feb 2019