# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'boxplot.3.png'
set border 2 front lt black linewidth 1.000 dashtype solid
set boxwidth 0.5 absolute
set style fill   solid 0.50 border lt -1
unset key
set pointsize 0.5
set datafile columnheaders
set style data boxplot
set xtics border in scale 0,0 nomirror norotate  autojustify
set xtics  norangelimit 
set xtics   ()
set ytics border in scale 1,0.5 nomirror norotate  autojustify
set title "Distribution of energy usage of the continents, grouped by type of energy source,\n assign individual colors (linetypes) to the factors taken from column 4\n" 
set ylabel "Billion Tons of Oil Equivalent" 
set jitter overlap 1  spread 0.5  wrap 0
NO_ANIMATION = 1
## Last datafile plotted: "energy_circles.dat"
plot 'energy_circles.dat' using (1):($8/1.e6):(0):4 lt 51 lc variable