\documentclass{article}
\usepackage{array}
\renewcommand{\strut}{\vrule height.9em depth.1em width0pt}
\begin{document}
\section*{The characters in ISO-8859-15}
\begin{tabular}{c|*{16}{>{\strut}c|}}
&00&01&02&03&04&05&06&07&08&09&0A&0B&0C&0D&0E&0F\\\hline
20&@&a&b&c&d&e&f&g&h&i&j&k&l&m&n&o\\\hline
30&p&q&r&s&t&u&v&w&x&y&z&&&&&\\\hline
40&@&A&B&C&D&E&F&G&H&I&J&K&L&M&N&O\\\hline
50&P&Q&R&S&T&U&V&W&X&Y&Z&&&&&\\\hline
\\\hline
\end{tabular}
\end{document}