Social Security is a well-known retirement income program run by the federal government. The program collects paid taxes from working Americans to provide benefits to people who are eligible. The latest data shows that almost 65 million people receive Social Security. It can be overwhelming to know all the numbers behind the program, but some of them can be very interesting.

Maybe you’re preparing for your Social Security benefits or already receiving payments and you want to familiarize yourself more with the rules. Or you’re just interested to find out more about the program. Either way, here’s a list of 10 numbers behind the huge government program.