Who are the top exporters of neon?

Could you please elaborate on the current state of the neon export market? Who are the leading nations that consistently rank at the top of the list when it comes to exporting neon? Are there any specific factors that contribute to their dominance in this sector? Additionally, are there any up-and-coming nations that are starting to make a name for themselves in the neon export industry, and if so, what sets them apart from the established exporters?