Interesting, some of the cold weather states rank right up to the top.
As I was told by a Canadian Rider, Enthusiasm is not related by the length of the season.
I travel down South for work on a regular basis and days that I'd love to be out riding, I see nobody on bikes. 70 degrees and nobody will be out riding, but at home, get a sunny 40 degree day and you'll see that every tenth vehicle will be a motorcycle of some kind.
Oh, and I'm on the Wisconsin/Illinois state line..
And I'm doing my best to skew the chart... I'm one person, but there's 7 motorcycles in the garage. (All titled, insured, and fully operational)