\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 (\%)}