Tourism in Maine is down this summer, at least when it comes to Canadians coming to vacation in the state due to a lagging dollar.

The state estimates that four million Canadians will visit Maine this year, which is down over 20% at 5.5 million from 2013.

This is partly due to the fact that the Canadian dollar is worth 78 cents in the US.

Maine tourism officials say that 16% of those visiting Maine are from Canada. Not so many as those who come from Massachusetts and New York at 22%, but the slide in numbers coming from Canada does affect the state’s economy.