This is basically a bar graph.A bar graph is a chart that uses either horizontal or vertical bars to
show comparisons among categories. One axis of the chart shows the
specific categories being compared, and the other axis represents a
discrete value. Some bar graphs present bars clustered in groups of more
than one (grouped bar graphs), and others show the bars divided into
subparts to show cumulate effect (stacked bar graphs).
This bar chart basically represents the number of visitors which arrive each year, the unit being millions. The bar chart also has a graph in it to guide the bars.