\begin{table}%t1
%\centering
\par
\caption{Categories of CME large-scale source structures}
\label{table1} %\centering
\par
\begin{tabular}{lrr}
\hline\hline 
\quad Associa. large-scale source structures    & CME number  & percent \\
\hline%\\%[3pt]
C1, EBRs                                                       & 104 & 36\%\\
C2, transequatorial magnetic loops                             & 116 & 40\%\\
C3, transequatorial filaments                                  & 37  & 13\%\\
C4, filaments along the boundaries of EBRs                     & 31  & 11\%\\
\hline
Total earth-directed CMEs                                      & 288 & 100\%\\
\hline
\end{tabular}
\end{table}