Subset the data for 1996 and generate the vertical bar chart for 1996. 
where year=1996;
vbar3d country / sumvar=megtons
                 subgroup=type
                 autoref
                 html=countrydrill
                 html_legend=typedrill
                 legend=legend1
                 cframe=grayaa
                 space=3
                 coutline=black
                 maxis=axis3
                 raxis=axis2
                 name='year96'
                 des='Production Breakdown for 1996';
run;
quit;