The Tooth Fairy who visits my house generally brings a $1 coin. But new research shows she's kind of cheap.

According to Delta Dental of Minnesota's annual Tooth Fairy poll, Minnesota kids receive an average of $2.01 per tooth - a very slight increase over last year.

Nationally, kids get an average of $2.52, an increase of 18 percent over the $2.13 given out in 2010. You can learn more about Tooth Fairy economics than you ever wanted to know at theofficialtoothfairypoll.com, a website dedicated to the topic.

The poll found that the dollar amount ranges from a single penny to $100.

Really? That must have been a gold tooth.

So parents, how much does the Tooth Fairy leave under pillows at your house?