In investigating bump charts (see development version of dashboard), there may be an easier way to select a subset of destinations for a given departure point than that in the previous post.
This Tableau advice on bump charts (example 4) helped. I used line labels directly rather than their proposed way to label the ends of the lines through other reports (which I couldn't get to work, and in any case could be more difficult if you have a variety of possible start and end years).
I'll come back later to see if I can adapt the main destinations time series chart to use the same method.
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