\renewcommand{\tdx}{1.2} % depth of 3d

\renewcommand{\tdx}{1.2} % depth of 3d
\renewcommand{\tdy}{6}

\def\onecol{red}
\def\onetopcol{blue}
\def\twocol{red}
\def\twotopcol{blue}
\def\threecol{red}
\def\threetopcol{blue}
%-------------------------------------------------------

%this is the way to redefine styles
% \newpsstyle{mytickstyle}{linewidth=1pt,linecolor=blue}
%
\newpsstyle{diagframestyle}{linewidth=1pt,linecolor=black,fillcolor=white}
\renewcommand{\betweenticks}{10}
\renewcommand\numbercolor{\white\bf}
\renewcommand{\placenumber}{\bottom}

\bardiagrambegin{14}{100}{3cm}{1}{5}{1cm}{0.1cm}
\drawlevellines
\baritem{1990}{32}{\onecol}
\subtopbaritem{}{40}{\onetopcol}
\subbaritem{2000}{20}{\twocol}
\subtopbaritem{}{30}{\twotopcol}
\subbaritem{2010}{13}{\threecol}
\subtopbaritem{}{50}{\threetopcol}
%---
\baritem{1990}{21}{\onecol}
\subtopbaritem{}{60}{\onetopcol}
\subbaritem{2000}{25}{\twocol}
\subtopbaritem{}{64}{\twotopcol}
\subbaritem{2010}{58}{\threecol}
\subtopbaritem{}{32}{\threetopcol}
%---
\baritem{1990}{22}{\onecol}
\subtopbaritem{}{19}{\onetopcol}
\subbaritem{2000}{12}{\twocol}
\subtopbaritem{}{18}{\twotopcol}
\subbaritem{2010}{9}{\threecol}
\subtopbaritem{}{12}{\threetopcol}
% Legend
%\diagLegendoptions{yellow}{yellow}{0.0pt}
%
\diagLegendbegin{11}{90}{2.5}
\diagLegenditem{girls}{\onecol}
\diagLegenditem{boys}{\onetopcol}
\diagLegendend

\bardiagramend{\parbox{14cm}{\vspace{-1.5cm}\hspace{-1cm}
\begin{tabular}{p{4.5cm}p{4.5cm}p{4.5cm}}
\centering Alpha's & \centering Beta's & \centering Gamma's
\end{tabular}
\\[0.6cm]
\centering \large Year}}
{\large Graduated (\%)}