Since I can't post links or anything...the information that I found is on the bottom. It has most of what you are looking for. I hope this helps

Autopsy studies have revealed that 3-6% of adults in the United States have aneurysms inside their brains. Fortunately, many of these aneurysms are small and not at risk to break. The rates of aneurysms found by accident when other studies are performed suggest that 8-10 million Americans have brain aneurysms. About 20-30% of people with an aneurysm will have more than 1. Each year, for every 100 people with an aneurysm, roughly 1 of them will suffer a rupture or break-a condition known as subarachnoid hemorrhage.

Currently no one can predict which aneurysms will rupture. Data suggest that aneurysms that rupture tend to be larger than 10 mm (0.4 in). About 25,000-30,000 cases of ruptured aneurysms occur in the US each year. About 40% of the people who suffer bleeding from an aneurysm die within the first month. Approximately another one third have residual major nervous system problems but survive.

Many are left with long-term memory problems. They may have difficulty in the following: thinking, perception, and performing simple daily activities.

People who have survived a rupture of a brain aneurysm are twice as likely as the general population to develop another aneurysm. If a second aneurysm occurs, these people are 6 times more likely to have another ruptured aneurysm and bleeding in their brain.