There is a good post over at Queensland Economy Watch on regional airline fares currently under scrutiny: Why is it so? Regional Qld airfares 2-3 times higher than in the city – guest post by Craig Wilson
Which includes Figure 2: Index of domestic passengers, 1985-86 to 2016-17
I recently looked at the same data set:
Hmm. I could also turn this into a post on the dangers of indexing to any starting date.