I need the numbers in the following table aligned by ":". Unfortunately the additional "," in the numbers causes some problems which I can't solve.
\documentclass[10pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{siunitx}
\sisetup{locale = DE}
\begin{document}
\begin{tabular}{@{}
l %
S[input-decimal-markers={:},table-format=2,1:1, output-decimal-markers={:}] %
S[input-decimal-markers={:},table-format=1,1:1, output-decimal-markers={:}] %
@{}}
Jahr & {\begin{tabular}[l]{@{}l@{}}Unkomplizierte\\ Leistenhernie\end{tabular}} & {\begin{tabular}[l]{@{}l@{}}Inkarzerierte\\ Leistenhernie\end{tabular}}\\
1976 & 10,0:1 & 6,3:1\\
1977 & 8,7:1 & 5,6:1\\
1978 & 8,8:1 & 7,4:1\\
1979 & 8,4:1 & 7,0:1\\
1980 & 8,0:1 & 5,6:1\\
\end{tabular}
\end{document}