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\begin{document}
\begin{tabular}{l|rrrrrrr}
& $A_{3}$ & $A_{4}$ & $A_{5}$ & $A_{6s} $ & $A_{7}$ & $A_{8}$ & $A_{9}$ \\
\hline
$A_{3}$ & $1.00$ &         $-0.07 $ &      $-0.11 $ &      $0.04 $ &       $0.06 $ &       $0.04 $ &       $-0.01 $  \\
$A_{4}$ &  &       $1.00$ &        $0.18 $ &       $-0.07 $ &      $-0.02 $ &      $0.05 $ &       $0.01 $ \\
$A_{5}$ &  &  &       $1.00$ &        $-0.11 $ &      $0.14 $ &       $-0.02 $ &      $0.02 $  \\
$A_{6s}$ &  &  &  &      $1.00$ &        $-0.03 $ &      $-0.14 $ &      $0.07 $ \\
$A_{7}$ &  &  &  &  &      $1.00$ &        $0.07 $ &       $-0.11 $ \\
$A_{8}$ &  &  &  &  &   &       $1.00$ &        $-0.08 $  \\
$A_{9}$ &  &  &   &  &  &  &    $1.00 $  \\
\end{tabular}
\end{document}
