用EXCEL很简单就可以实现，
具体参考excel图表向导。

那SAS中如何实现呢？

Here is a prototype of the sgplot with vbar. I think you need a version SAS 9.2 or higher.

data t1;

      do age='1). <20  ', '2). 20-40','3). 40-60','4). 60-80','5). 80+';
             POP=abs( (age='1). <20  ')*1*rannor(123)+
             (age='2). 20-40')*3*rannor(123)+
             (age='3). 40-60')*3*rannor(123)+
             (age='4). 60-80')*2*rannor(123)+
             (age='5). 80+  ')*0.5*rannor(123));
                         year=2008;
                 output;
                 pop=pop+abs(rannor(123)*0.3);
                 year=2012;
                 output;
                end;

run;


proc sgplot data=t1;
  yaxis label="POPULATION (10 M.)" ;
  vbar AGE / response=POP GROUP= year GROUPDISPLAY= CLUSTER
;
run;

Damn it! I am using SAS 9.1, how can I do that with SAS 9.1?

proc gchart data=t1;
vbar year/group=age discrete patternid=midpoint ;
run;