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1\begin{tabular}{lrrrrrrrrr}2\toprule3Radius & $k=1$ & $k=3$ & $k=5$ & $k=7$ & $k=10$ & $k=15$ & $k=20$ & $k=30$ & $k=50$ \\4\midrule5$\le 0.5$ km & 15.8 & 13.3 & 12.6 & 12.3 & 12.2 & 12.1 & \textbf{12.0} & 12.1 & 12.1 \\6$\le 1$ km & 16.1 & 13.5 & 12.8 & 12.5 & 12.3 & 12.2 & \textbf{12.1} & 12.1 & 12.1 \\7$\le 2$ km & 16.4 & 13.7 & 12.9 & 12.6 & 12.3 & 12.2 & \textbf{12.1} & 12.1 & 12.1 \\8$\le 5$ km & 16.5 & 13.8 & 13.0 & 12.7 & 12.4 & 12.2 & \textbf{12.2} & 12.2 & 12.2 \\9$\le 10$ km & 16.5 & 13.8 & 13.0 & 12.6 & 12.4 & 12.2 & \textbf{12.1} & 12.1 & 12.1 \\10$\le 25$ km & 16.5 & 13.8 & 13.0 & 12.6 & 12.4 & 12.2 & 12.1 & 12.1 & \textbf{12.1} \\11\bottomrule12\end{tabular}13