# set terminal svg size 600,400 dynamic enhanced fname 'arial'  fsize 10 mousing name "fillbetween_1" butt solid 
# set output 'fillbetween.1.svg'
set style data lines
set title "Fill area between two curves" 
set xrange [ 10.0000 : * ] noreverse nowriteback
set yrange [ 0.00000 : 175.000 ] noreverse nowriteback
x = 0.0
plot 'silver.dat' u 1:2:3 "%lf %lf %lf" w filledcu,       '' u 1:2 lt -1 notitle, '' u 1:3 lt -1 notitle