 It's estimated that 4.2 million Americans have provided unpaid care to an adult age 50 or older in the last 12 months.The value of services provided by informal caregivers has steadily increased over the last decade, with an estimated economic value of $470 billion in 2013, up from $450 billion in 2009 and $375 billion in 2007.Family caregivers spend an average of 24.4 hours per week providing care, while nearly 1 in 4 caregivers spends 41 hours or more per week providing care.