with a svg version Created by using gnuplot 4.4 patchlevel 0-rc1 (it allowed me to modify font size of the key which the current stable release does not) Script:

set terminal svg enhanced fname "Helvetica" fsize 10 size 600 500 set output "AustralianReligiousAffiliation.svg" set style histogram rowstacked set boxwidth .7 absolute set style fill solid 1.0 border -1 set style data histograms set yrange [0:100] set ylabel "% self-describing religious affiliation" set xlabel "Census Year" set key outside bottom right horizontal font "Helvetica,8" set title "Major religious affiliations described in Australian censuses" font " Helvetica,14" plot 'australia.data-2' \ using 2 t "Anglican" fs pattern 2 lc rgb "blue" , \ '' using 3 t "Catholic" fs pattern 5 lc rgb "red" , \ '' using 4 t "Other Christian"  fs  pattern 1 lc rgb "gray" , \ '' using 6 t "Other religions" fs solid lc rgb "yellow", \ '' using 7 t "No religion" fs pattern 4 lc rgb "green", \ '' using 8:xtic(1) t "Not stated/inadequately described"  fs pattern 3 lc rgb "purple"