\begin{table}
\centering
\begin{tblr}[         %% tabularray outer open
]                     %% tabularray outer close
{                     %% tabularray inner open
colspec={Q[]Q[]Q[]},
}                     %% tabularray inner close
\toprule
x3 & x4 & x5 \\ \midrule %% TinyTableHeader
900. &  900.5 &  900.5 \\
1000. & 1000.  & 1000.5 \\
1100. & 1100.  & 1100.5 \\
\bottomrule
\end{tblr}
\end{table} 
