% generated by tables/make_tables.py from ./results/bibliometrics/countries_yearly.csv
\begin{table}[htbp]\centering\caption{Share of fractional output of the fifteen largest countries by year (per cent).}\label{tab:country_shares}
\begin{threeparttable}\small
\begin{tabular}{lrrrrrrrrr}
\toprule
\textbf{Country} & \textbf{2018} & \textbf{2019} & \textbf{2020} & \textbf{2021} & \textbf{2022} & \textbf{2023} & \textbf{2024} & \textbf{2025} & \textbf{2026} \\
\midrule
CN & 17.83 & 19.64 & 19.99 & 22.12 & 24.19 & 24.91 & 26.05 & 26.39 & 24.79 \\
US & 15.30 & 15.02 & 14.71 & 13.47 & 12.28 & 11.78 & 11.70 & 11.00 & 12.97 \\
IN & 6.61 & 5.99 & 6.72 & 7.01 & 7.81 & 8.35 & 8.73 & 9.04 & 8.32 \\
ID & 2.76 & 3.30 & 3.82 & 4.41 & 4.94 & 5.97 & 6.37 & 6.79 & 6.46 \\
DE & 4.49 & 4.38 & 4.17 & 4.01 & 3.86 & 3.71 & 3.47 & 3.24 & 3.36 \\
GB & 3.83 & 3.68 & 3.55 & 3.32 & 3.10 & 3.01 & 2.95 & 2.75 & 2.95 \\
JP & 3.64 & 3.44 & 3.01 & 2.80 & 2.70 & 2.54 & 2.43 & 2.23 & 2.11 \\
FR & 3.84 & 3.40 & 2.92 & 2.86 & 2.83 & 2.58 & 2.30 & 2.07 & 1.99 \\
IT & 2.47 & 2.45 & 2.35 & 2.28 & 2.29 & 2.22 & 2.13 & 2.10 & 1.95 \\
KR & 2.25 & 2.18 & 2.23 & 2.17 & 2.18 & 2.07 & 2.03 & 2.09 & 2.19 \\
CA & 2.27 & 2.28 & 2.25 & 2.15 & 2.05 & 1.94 & 1.82 & 1.65 & 1.73 \\
BR & 2.52 & 2.38 & 2.18 & 1.94 & 1.67 & 1.62 & 1.58 & 1.64 & 1.52 \\
RU & 1.97 & 2.09 & 2.31 & 2.22 & 1.75 & 1.41 & 1.24 & 1.20 & 1.35 \\
ES & 2.07 & 1.97 & 1.90 & 1.72 & 1.61 & 1.53 & 1.42 & 1.32 & 1.29 \\
AU & 1.81 & 1.77 & 1.74 & 1.66 & 1.51 & 1.39 & 1.38 & 1.28 & 1.38 \\
\bottomrule
\end{tabular}
\begin{tablenotes}\footnotesize\item Fractional counting: each work is divided equally among its distinct author countries, so the shares of all countries sum to 100 within a year. ISO 3166-1 alpha-2 codes. 2026 is incomplete.\end{tablenotes}
\end{threeparttable}\end{table}