What does it mean to live to 100? People turning 100 in 2012 have witnessed a lot of amazing events. Four states have entered the union – New Mexico and Arizona the year they were born and Alaska and Hawaii when they were 47. Humans landed on the moon for the first time when they were 57. And when they were 23 – right when they entered the workforce – Social Security was created. That means many of today’s centenarians paid into Social Security their whole working lives – and have relied on it for many decades as well. This reliance is particularly true for women, who are the majority of elderly Social Security beneficiaries – and especially very old beneficiaries. A new Census report released today (PDF) shows that women were a whopping 82.8 percent of all people who were age 100 and older. Social Security has been there for these women and their families for almost all of their lives.