Do states with strict seatbelt laws really have fewer automotive fatalities?

I’ve seen a lot of ads lately (in my home state) about seat belt laws, advertising that you will get pulled over and ticketed for not wearing a seat belt. Other states I’ve visited have signs along their highways reminding people to buckle up, but some emphasize it more than others. Seat belt laws vary greatly from state to state, and I have to wonder if they are really as effective as the intend to be.

I found this article which, although it seems to be a little old, mentions that seatbelts sometimes result in more aggressive driving, while non-buckled drivers tend to drive more safely because they are not protected by the seatbelt.

This article mentions that states with standard seat belt laws have a higher rate of belt use, but does it really result in fewer fatalities? If drivers are feeling forced to wear seatbelts (which some claim hinder the driver’s movements) what kind of negative effects would that have in terms of auto accidents? And do police really enforce seat belt laws? I’ve never heard of anyone being pulled over just because they’re not buckled up, but that might just be me.