\begin{table}%t1
%\centering
\par
\caption{\label{Tabla1}Collisional evolution results about Pluto.}
\begin{tabular}{lccc}
\hline \hline \noalign{\smallskip}
 & Initial Pop. 1   &  Initial Pop. 2   & Initial Pop. 3  \\
\hline 
$N(D > 1)$  &  5552   &  2843   &  1271    \\
$\tau(D > 1)$ (Myr)  &  0.63  &   1.23  &  2.75  \\
$D_{{\rm i,Max}}$ (km) &  22.5  &  20.1  &   16.8   \\
$C(D > 1)$  &  113~879   &  76~726   &  43~076    \\
$D_{{\rm c,Max}}$ (km) &   38.8  &  35.5  &   30.1  \\
\hline
\end{tabular}
\tablefoot{$N(D > 1)$ is the total number of $D > 1$~km Plutinos impacting Pluto over 3.5~Gyr, $\tau(D > 1)$ the timescale on which these impacts occur, $D_{{\rm i,Max}}$ the  largest Plutino expected to have struck Pluto during the past 3.5~Gyr,  $C(D > 1)$ the total number of $D > 1$~km craters on Pluto produced by 
Plutino impacts over 3.5~Gyr, and $D_{{\rm c,Max}}$ the largest crater diameter on Pluto.}
\end{table}