My guess would be five years, and some of them have been going on for much longer, because it's a challenge to get funding for them. It might start out as a local project. We have a big wind park outside Tromsø that is now under construction. It's about three billion Norwegian kroner, which is about $500 million Canadian. That was started as a local project, but it's now owned by a German pension fund for doctors. They have come in and taken over, and that gave speed to the process, because the locals couldn't raise all that money.
On February 7th, 2019. See this statement in context.