FREQ Statement
FREQ variable ;

The variable in the FREQ statement identifies a numeric variable in the data set that contains the frequency of occurrence for each observation. PROC FMM treats each observation as if it appears times, where is the value of the FREQ variable for the observation. If it is not an integer, the frequency value is truncated to an integer. If the frequency value is less than 1 or missing, the observation is not used in the analysis. When the FREQ statement is not specified, each observation is assigned a frequency of 1.