A question was raised by WMF legal dept. on the total number of external links in all Wikipedias.
Wikistats doesn't have numbers on this after 2010. This is because Wikistats parses stub dumps (stub = without page content). It used to parse so called full archive dumps (all page revisions, all page content).
After 2010 it was no longer possible to parse these full archive dumps for our largest wikis, due to performance constraints.