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Phosphateproductionworldwide.svg de Weltweite Phosphatfrderung own StefanPohl other versions cczero reset set term svg size fname 'Arial bold' fsize lw set border unset key set grid lt lw lc rgb xAAAAAA set tics nomirror set xtics rotate by right set ylabel 'Mt' set autoscale xfix set output 'usgs svg' plot 'usgs txt' unset