\begin{table}[htbp]
\centering\footnotesize
\caption{Transaction selection — annual sale rate of the roll stock (\% of units sold per year, 2021--2026) by quintile of floor area and of age}\label{tab:selection_rates}
\begin{threeparttable}
\begin{tabular}{lrrrrr}
\toprule
Class and dimension & Q1 & Q2 & Q3 & Q4 & Q5 \\
\midrule
house, by floor area quintile (1 = smallest / newest) & 4.3 & 3.9 & 3.9 & 3.8 & 3.5 \\
house, by age quintile (1 = smallest / newest) & 4.8 & 3.7 & 3.3 & 3.9 & 3.8 \\
condo, by floor area quintile (1 = smallest / newest) & 5.8 & 6.4 & 6.7 & 6.8 & 5.5 \\
condo, by age quintile (1 = smallest / newest) & 5.6 & 7.2 & 6.3 & 6.1 & 6.1 \\
plex, by floor area quintile (1 = smallest / newest) & 5.6 & 4.8 & 4.2 & 4.0 & 3.8 \\
plex, by age quintile (1 = smallest / newest) & 4.6 & 4.0 & 4.1 & 4.7 & 4.9 \\
\bottomrule
\end{tabular}
\end{threeparttable}
\end{table}