# set terminal png transparent nocrop enhanced font arial 8 size 420,320 
# set output 'histograms.4.png'
set boxwidth 0.75 absolute
set style fill   solid 1.00 border -1
set key outside right top vertical Left reverse enhanced autotitles columnhead nobox
set key invert samplen 4 spacing 1 width 0 height 0 
set style histogram rowstacked title  offset character 0, 0, 0
set datafile missing '-'
set style data histograms
set xtics border in scale 1,0.5 nomirror rotate by -45  offset character 0, 0, 0 
set xtics   ("1891-1900" 0.00000, "1901-1910" 1.00000, "1911-1920" 2.00000, "1921-1930" 3.00000, "1931-1940" 4.00000, "1941-1950" 5.00000, "1951-1960" 6.00000, "1961-1970" 7.00000)
set title "US immigration from Europe by decade\nPlot as stacked histogram" 
set yrange [ 0.00000 : 7.00000e+06 ] noreverse nowriteback
i = 23
plot 'immigration.dat' using 2:xtic(1), for [i=3:22] '' using i