% generated by tables/make_tables.py from /Users/simon-pierreboucher/Desktop/UQO/Recherche/Recherche-UQO/informatique/wp44/results/graph/cross_area_share_yearly.csv
\begin{table}[htbp]\centering\caption{Cross-area share of internal references by citing area and citing year (per cent), with the aggregate share and its composition-adjusted counterpart.}\label{tab:p9-cross-area}
\begin{threeparttable}\small
\begin{tabular}{lrrrrrrrrr}
\toprule
\textbf{Citing area} & \textbf{2018} & \textbf{2019} & \textbf{2020} & \textbf{2021} & \textbf{2022} & \textbf{2023} & \textbf{2024} & \textbf{2025} & \textbf{2026} \\
\midrule
AI \& ML & 46.6 & 48.1 & 49.3 & 51.0 & 55.1 & 55.3 & 54.9 & 55.4 & 53.9 \\
Computational science & 31.9 & 33.4 & 31.6 & 31.4 & 32.3 & 33.8 & 34.8 & 34.6 & 31.3 \\
Data \& distributed & 25.8 & 24.2 & 25.1 & 26.7 & 27.1 & 28.1 & 28.9 & 29.7 & 30.8 \\
Hardware \& emerging & 30.2 & 29.0 & 29.2 & 28.5 & 28.0 & 28.8 & 28.7 & 28.1 & 29.6 \\
Perception \& interaction & 20.5 & 16.2 & 15.7 & 15.8 & 15.2 & 15.3 & 15.2 & 15.6 & 16.3 \\
Security \& privacy & 32.6 & 34.4 & 35.8 & 36.7 & 36.7 & 37.3 & 38.8 & 39.6 & 39.9 \\
Software \& PL & 29.9 & 30.2 & 32.8 & 33.5 & 33.8 & 35.3 & 35.8 & 36.3 & 35.5 \\
Theory & 30.0 & 35.1 & 36.1 & 35.9 & 34.7 & 35.4 & 35.8 & 36.5 & 37.8 \\
All areas, raw & 27.8 & 25.9 & 26.3 & 26.9 & 26.8 & 27.4 & 28.2 & 29.5 & 30.5 \\
All areas, baseline area weights & 27.4 & 25.9 & 26.1 & 26.8 & 27.1 & 27.6 & 27.8 & 28.3 & 28.6 \\
Internal references (count) & 213{,}358.0 & 975{,}445.0 & 2{,}131{,}658.0 & 3{,}556{,}446.0 & 4{,}288{,}984.0 & 5{,}706{,}569.0 & 6{,}799{,}414.0 & 7{,}477{,}998.0 & 4{,}558{,}848.0 \\
\bottomrule
\end{tabular}
\begin{tablenotes}\footnotesize\item Equation~\eqref{eq:cross-area}: the share of an area's resolved internal references whose cited work has a primary category in another area. The composition-adjusted aggregate fixes each area's weight at its 2018--2022 share of internal references, so that it moves only when the areas' own cross-area rates move. The last row is the number of internal references with both ends classified. 2026 is incomplete.\end{tablenotes}
\end{threeparttable}\end{table}