When you specify the LIST option in the STRATA statement, PROC SURVEYLOGISTIC displays a "Stratum Information" table, which provides the following information for each stratum:
Stratum Index, which is a sequential stratum identification number
STRATA variable(s), which lists the levels of STRATA variables for the stratum
Population Total, if you specify the TOTAL= option
Sampling Rate, if you specify the TOTAL= or RATE= option. If you specify the TOTAL= option, the sampling rate is based on the number of nonmissing observations in the stratum.
N Obs, which is the number of observations
number of Clusters, if you specify a CLUSTER statement