Indoor vs Outdoor cat - Why are there more "house" cats now?

Where I used to live, there were coyotes in our area. We had lost a couple cats to them, so we have learned to keep them inside. After we moved to a new house, I noticed there weren't too many outside cats. I soon figured out why. In my neighborhood, for some reason, it seems everyone owns a huge dog. Some of these dogs get loose quite often (it's freaky when you're outside watering and a huge dog comes running up to you). There's no way I'd let my cats outside with loose dogs around.