\begin{table}%t1
\caption{\label{tab:gal_pop}Reference spectral types and galactic population models used in this work.}
%\centering
\par
\begin{tabular}{lrrrcr}
\hline\hline\noalign{\smallskip}
Spectral type     & \multicolumn{3}{c}{Population (\%)}  &  $u-r$ & $R_{{\rm IR},r}$  \\
                  & no ev. & ref. & cons. &        &                 \\
\hline
\it{-Early-type}  &      &      &      &             &        \\
BCG               &  4.3 &  4.0 &  4.2 &     --      &   0.12  \\
E/S0              & 65.4 & 61.5 & 63.3 &     --      &   0.12  \\
(Tot. early-type) &(69.7)&(65.5)&(67.5)&             &        \\
\\
\it{-Late-type}   &      &      &      &             &        \\
Sa                &  4.4 &  5.1 &  6.5 &  $>$2.2     &   2.36 \\
Sb                &  9.6 & 10.7 & 11.7 &  1.8--2.2   &  13.82 \\
Sc                & 15.8 & 18.2 & 14.1 &  1.0--1.8   &  33.80 \\
Starburst         &  0.5 &  0.5 &  0.2 &  $<$1.0     &  73.16 \\
(Tot. late-type)  &(30.3)&(34.5)&(32.5)&             &        \\
\hline
\end{tabular}
\tablefoot {The fraction (in percentile) of each type of galaxies in the three population models is shown: without redshift evolution, in our reference model and for the conservative scenario (second to fourth column, respectively). The fifth column shows the corresponding intrinsic $u-r$~color intervals used for the modelisation of the spirals (early-type galaxies are taken directly from the SDSS-maxBCG catalogue). The last column shows the values of the ratio~$L_{\rm IR}/L_r$ for each template.}
\end{table}