% generated by tables/make_tables.py from ./results/graph/cited_age_yearly.csv
\begin{table}[htbp]\centering\caption{Age of cited works by citing year (resolved references of eligible works; corpus version of the result file at generation time).}\label{tab:cited_age}
\begin{threeparttable}\small
\begin{tabular}{lrrrrrrr}
\toprule
\textbf{Citing year} & \textbf{References} & \textbf{Negative (\%)} & \textbf{Mean age} & \textbf{Median} & \textbf{0--2 y (\%)} & \textbf{0--5 y (\%)} & \textbf{over 10 y (\%)} \\
\midrule
2018 & 8{,}030{,}095 & 0.87 & 9.72 & 6 & 21.0 & 44.5 & 31.8 \\
2019 & 9{,}394{,}192 & 0.86 & 9.44 & 6 & 22.8 & 47.2 & 30.4 \\
2020 & 10{,}724{,}215 & 0.85 & 9.11 & 6 & 24.1 & 49.6 & 29.0 \\
2021 & 12{,}371{,}582 & 0.77 & 8.76 & 5 & 25.2 & 52.3 & 27.1 \\
2022 & 11{,}826{,}877 & 0.49 & 8.39 & 5 & 25.4 & 54.0 & 25.1 \\
2023 & 13{,}154{,}579 & 0.32 & 8.13 & 5 & 25.1 & 55.3 & 23.3 \\
2024 & 13{,}790{,}112 & 0.15 & 7.91 & 5 & 25.7 & 56.2 & 21.9 \\
2025 & 13{,}789{,}314 & 0.05 & 7.73 & 5 & 27.8 & 57.1 & 21.0 \\
2026 & 8{,}276{,}031 & 0.00 & 7.80 & 5 & 27.3 & 56.6 & 20.9 \\
\bottomrule
\end{tabular}
\begin{tablenotes}\footnotesize\item References: resolved references of eligible works of the citing year. Age is the citing year minus the cited work's publication year. Negative ages (cited work dated after the citing work: preprints cited before their published version, or year-only dates) are excluded from the age statistics and reported as a share. The 2026 row is incomplete.\end{tablenotes}
\end{threeparttable}\end{table}