Here we show a series of networks, one for each year (2002-2020). The size of vertices in the network is proportional to the an author's degree (number of edges). Note that authors with several accepted papers and/or with several coauthors (in the same paper or not) have higher degrees. For clarity, a threshold was applied to each network so that only authors with degree higher than that are shown by their names.
Also, some metrics are shown for each network, highlighting measures such as average degree and number of clusters.