Histogram

http://gnuplot.sourceforge.net/demo_4.3/histograms.html

Histograms are used to show the distributions of data and their frequencies. Their main focus is to show statistical variances of the different variables. This histogram for instance is showing the immigration amounts from Northern Europe into Denmark, Netherlands, Norway, and Sweden during the different years. The years being represented can be found in the top right portion of the graph and are color coordinated with the immigration amounts and country of origin. As one can see, Sweden has by far received the highest amounts of immigrants over the decades.