1% generated by tables/make_tables.py from ./results/graph/reference_coverage_yearly.csv2\begin{table}[htbp]\centering\caption{Reference coverage by citing year: declared, resolved, internal and external references of eligible works.}\label{tab:reference_coverage}3\begin{threeparttable}\small4\begin{tabular}{lrrrrrrr}5\toprule6\textbf{Year} & \textbf{Works} & \textbf{Declared refs.} & \textbf{Refs./work} & \textbf{Resolved (\%)} & \textbf{Internal} & \textbf{External} & \textbf{Internal (\%)} \\7\midrule82018 & 642{,}849 & 11{,}636{,}120 & 18.10 & 91.38 & 250{,}426 & 10{,}382{,}501 & 2.36 \\92019 & 695{,}369 & 13{,}742{,}477 & 19.76 & 90.90 & 1{,}140{,}570 & 11{,}351{,}646 & 9.13 \\102020 & 709{,}083 & 15{,}693{,}875 & 22.13 & 90.83 & 2{,}472{,}715 & 11{,}781{,}999 & 17.35 \\112021 & 711{,}244 & 18{,}149{,}160 & 25.52 & 90.12 & 4{,}123{,}503 & 12{,}233{,}358 & 25.21 \\122022 & 699{,}548 & 17{,}415{,}217 & 24.89 & 90.16 & 5{,}007{,}511 & 10{,}694{,}227 & 31.89 \\132023 & 785{,}194 & 19{,}017{,}108 & 24.22 & 90.06 & 6{,}602{,}036 & 10{,}524{,}219 & 38.55 \\142024 & 901{,}654 & 19{,}707{,}017 & 21.86 & 90.70 & 7{,}830{,}508 & 10{,}044{,}195 & 43.81 \\152025 & 1{,}065{,}828 & 18{,}600{,}370 & 17.45 & 94.27 & 8{,}532{,}009 & 9{,}003{,}120 & 48.66 \\162026 & 901{,}651 & 9{,}809{,}537 & 10.88 & 99.81 & 5{,}195{,}458 & 4{,}595{,}776 & 53.06 \\17\bottomrule18\end{tabular}19\begin{tablenotes}\footnotesize\item Works: eligible works of the year (including works with no reference list); Declared: entries of their OpenAlex \texttt{referenced\_works} lists; Resolved: declared references that resolve to an OpenAlex record (internal = cited work in the eligible corpus; external = cited work outside it), as a share of the declared count; Internal (\%): internal share of resolved references. The resolved share of 2025--2026 is higher than in earlier years because the recent cohorts carry fewer parsed references per work (reference extraction lags publication) and the parsed ones resolve more often; it describes the database, not citing behaviour. The 2026 row is incomplete.\end{tablenotes}20\end{threeparttable}\end{table}21