I have a problem with alignment in a multicolum, here's the code
\begin{table}[H]
\caption{Statistic values of dementia epidemiology over the world.}
\begin{tabular}{ccrccc}
\hline
\multirow{2}{*}{Region} & \multicolumn{3}{c}{ Number of people with dementia (millions)} & \multicolumn{2}{c}{ Proportionate increases (\%)} \\
\multicolumn{1}{l}{} & 2010 & 2030 & 2050 & 2010-2030 & 2010-2050 \\ \hline
Asia & 15,94 & 33,04 & 60,92 & 107 & 282 \\
Europe & 9,95 & 13,95 & 18,65 & 40 & 87 \\
The Americas & 7,82 & 14,78 & 27,08 & 89 & 246 \\
Africa & 1,86 & 3,92 & 8,74 & 111 & 370 \\ \hline
World & 35,56 & 65,69 & 115,38 & 85 & 225 \\ \hline
\end{tabular}
\label{tab:stats}
\end{table}
But the result in the second to forth colum is strange,


