According to the 2011 AARP Public Policy Institute report, in 2009, about 42.1 million family caregivers in the United States provided care to an adult with limitations in daily activities at any given point in time, and about 61.6 million provided care at some time during the year. The estimated economic value of their unpaid contributions was approximately $450 billion in 2009, up from an estimated $375 billion in 2007. Earlier estimates have shown steady growth in the economic value of family care from about $200 billion in 1996.
Of the $75 billion increase in estimated economic value between 2007 and 2009, 57 percent or about $43 billion was due to an increase in the number of family caregivers and hours of care (a 23 percent increase in the number of caregivers, and a 9 percent increase in the number of hours of care), and 43 percent or about $33 billion was due to an increase in the estimated economic value per hour from $10.10 in 2007 to $11.16 in 2009.
The MetLife Study of Caregiving Costs to Working Caregivers is another great report. Visit http://www.caregiving.org/wp-content/uploads/2011/06/mmi-caregiving-costs-working-caregivers.pdf