LaTeX: Tables and Columns and Units, oh my

[NeoDevin]

I'm trying to make a table in LaTeX in which all the entries of a column have the same units, without having to type them for each column. (Before you say it, yes, I know I could just put the units in the column heading, but I don't want to).

I tried:

\documentclass{article}
\usepackage{siunitx}
\begin{document}
\begin{center}\begin{tabular}{|>{\SI\bgroup}c<{\egroup{\centi m}}|c|c|c|}\hline
0.1 & 0.2 & 0.3 & 0.4 \\ \hline
0.5 & 0.6 & 0.7 & 0.8 \\ \hline
\end{tabular}\end{center}
\end{document}

Which gives:

! Package siunitx Error: Invalid character `\bgroup ' in numerical input.

Any suggestions?
Thanks in advance.

 

[NeoDevin]

Figured it out.

If anyone else is interested

\documentclass{article}
\usepackage{siunitx}
\begin{document}
\begin{center}\begin{tabular}{|S<{\, \si{\centi m}}|c|c|c|}\hline
0.1 & 0.2 & 0.3 & 0.4 \\ \hline
0.5 & 0.6 & 0.7 & 0.8 \\ \hline
\end{tabular}\end{center}
\end{document}

Works as long as the numbers are all the same length.