The following visualization was made completely in D3. On this page, one can find an interactive globe. It is possible to change the year using the slider, as well cycle through the whole data set using the time travel button below.
Since smaller countries, such as Belgium, were quite hard to hover over, zoom funcionality was added. Also a colorbar was added, making the visualisation more interpretable. The scale of the colorbar correctly adapts when the chosen year changes.
A video of the visualization is given below.
Data Visualization Blog KU Leuven 