\documentclass[12pt,a4paper]{article}
\begin{document}
\begin{table}[ht]
\begin{center}
\caption{All statistics are based on contigs of size $\geq$ 500 bp, unless otherwise noted (e.g., "\# contigs ($\geq$ 0 bp)" and "Total length ($\geq$ 0 bp)" include all contigs).}
\begin{tabular}{|l*{1}{|r}|}
\hline
Assembly & final.contigs \\ \hline
\# contigs ($\geq$ 0 bp) & 3252416 \\ \hline
\# contigs ($\geq$ 1000 bp) & 814566 \\ \hline
\# contigs ($\geq$ 5000 bp) & 47516 \\ \hline
\# contigs ($\geq$ 10000 bp) & 15108 \\ \hline
\# contigs ($\geq$ 25000 bp) & 2779 \\ \hline
\# contigs ($\geq$ 50000 bp) & 673 \\ \hline
Total length ($\geq$ 0 bp) & 3441130766 \\ \hline
Total length ($\geq$ 1000 bp) & 1826466653 \\ \hline
Total length ($\geq$ 5000 bp) & 527919216 \\ \hline
Total length ($\geq$ 10000 bp) & 307993148 \\ \hline
Total length ($\geq$ 25000 bp) & 128221960 \\ \hline
Total length ($\geq$ 50000 bp) & 58102809 \\ \hline
\# contigs & 3252416 \\ \hline
Largest contig & 470780 \\ \hline
Total length & 3441130766 \\ \hline
GC (\%) & 60.82 \\ \hline
N50 & 1072 \\ \hline
N75 & 675 \\ \hline
L50 & 712204 \\ \hline
L75 & 1751797 \\ \hline
\# N's per 100 kbp & 0.00 \\ \hline
\end{tabular}
\end{center}
\end{table}
\end{document}
