set terminal svg 
set size 1.0,0.9

set output 'files_by_date.svg'
unset key
set xdata time
set timefmt "%Y-%m-%d"
set format x "%Y-%m-%d"
set grid y
set ylabel "Files"
set xtics rotate by 90
set ytics autofreq
set bmargin 6
plot 'files_by_date.dat' using 1:2 w steps