\begin{center}\begin{small}\begin{tabular}{|c|l||r|r|r||r|}\hline
 & title & \multicolumn{3}{c||}{years } & total \\\cline{3-5}
 &       & \multicolumn{1}{c|}{1} & \multicolumn{1}{c|}{2} & \multicolumn{1}{c||}{3} &  \\\hline\hline
Task-1 & Project management & 0.5 & 0.5 & 0.5 & 1.5 \\\hline
Task-2 & Backbone infrastructure & 5.0 & 2.0 & 0.0 & 7.0 \\\hline
Task-4 & HAS front-end & 5.5 & 10.0 & 17.5 & 33.0 \\\hline
Task-8 & Dissemination & 0.0 & 1.5 & 2.0 & 3.5 \\\hline
\hline
 & total &  11.5 & 14.5 & 20.0 & 46.0 \\\hline
\end{tabular}\end{small}\end{center}