Rick, It would be look better if you include country name into Histogram. So you are going to vote for Hillary ?

proc sort data=FemaleLeaders;
by year;
run;

data FemaleLeaders;
set FemaleLeaders;
by year;
retain n 1;
if first.year then x=0;
x+1;
lag_x=lag(x);
if first.year then lag_x=0;
label_x=mean(lag_x,x);
if last.year then do;count=x;count_x=x+0.2;end;
drop x lag_x;
run;

ods graphics / reset noborder width=10in height=8in ;
proc sgplot data=FemaleLeaders noautolegend subpixel nocycleattrs noborder;
hbarparm category=year response=n /group=country dataskin=pressed barwidth=1;
text x=count_x y=year text=count;
text x=label_x y=year text=country/textattrs=(size=7) strip ;
xaxis display=none;
yaxis display=(nolabel noticks noline) integer;
run;