Applied Longitudinal Data Analysis: Modeling Change and Event Occurrenceby Judith D. Singer and John B. Willett Chapter 9: A framework for investigating event occurrence | SAS Textbook Examples

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Fig. 9.1 on page 321.

goptions reset=all htext=1 device=jpeg;
pattern1 color=gray;
axis1 order=(0 to 500 by 100) minor=none label=none;
proc gchart data = 'c:\alda\teachers';
 vbar3d t /  group=censor outside=freq  discrete shape=c
			cframe=white noframe  width=3 nozero raxis=axis1;
run;
quit;