Bar plot with custom bar label

CustomBlabel.do

// see https://www.statalist.org/forums/forum/general-stata-discussion/general/33124-adding-other-data-as-a-label-to-bar-graph
sysuse census, clear

collapse (sum) pop pop5_17, by(region)
generate pr_5_17 = round(pop5_17/pop, 0.01)*100
replace pop = pop/1000000
rename pop pop_millions
graph bar (asis) pop_millions, over(region) ytitle("Population (In Millions)") blabel(bar)


local nb=`.Graph.plotregion1.barlabels.arrnels'
forval i=1/`nb' {
  .Graph.plotregion1.barlabels[`i'].text[1]=`"`=string(`=pr_5_17[`i']',"%6.1f")'% of `=string(`=pop_mil[`i']',"%6.1f")'mln"'
}
.Graph.drawgraph