Art Price provides insights on the art market place. One of the things they do is collect data on auction prices of all arts auctioned in the West. The "indexes are calculated based on all fine art auction results (paintings, sculptures, drawings, photographs, prints) in USD." This graph shows who the indexes have done in the last 20 years. The baseline is 1998 for each. Each ribbon grows (or shrinks) year over year to show how that market is doing. They are organized so that for any year the best performing market (of these) is on top. Notice the overall narrowing of the market after the financial crisis. Photography has been doing relatively well!