Silver Book Fact
In 2007, the 9.8 million family and other unpaid caregivers of people with Alzheimer’s and other dementias provided 8.4 billion hours of care.
Alzheimer's Association. 2008 Alzheimer’s Disease Facts and Figures. Alzheimers Dement. 2008; 4(2): 110-33. http://www.alzheimersanddementia.com/article/S1552-5260(08)00033-2/fulltext