1st picture is the expected way in a table cell, 2nd picture is the failed outcome using the following table rules. 1st picture's table cell items can be written in two lines, but in the 2nd picture it cannot make two or three lines, please help me to modify the rules to make the 2nd one as 1st one, Thank you very much
\sisetup{table-format=4.2(3), separate-uncertainty} \small \setlength\tabcolsep{0pt} \begin{threeparttable} \caption{} \label{tbl:Filt res polymer} \begin{tabular*}{\textwidth}{@{\extracolsep{\fill}}>{$}l<{$} *{6}{S} } \toprule \textbf{Year} &{\textbf{{Permissioned lottery-based}}} & \mcc[3]{\textbf{CMC}} \\ \cmidrule{2-3} \cmidrule(l){4-5} \cmidrule(l){6-7} % \textbf{[ppb]} & \mcc{\textbf{1.05}} & \mcc{\textbf{2.10}} & \mcc{\textbf{0.525}} & \mcc{\textbf{1.05}} & \mcc{\textbf{2.10}} \\ \midrule \bottomrule \end{tabular*} \begin{tablenotes}[]\small \item[*] \end{tablenotes} \end{threeparttable} \end{table*} 
\mccis defined.