Hours of Unpaid Care and Its Economic Value (3,4,12)
| Parameter | 2013 | 2015 | 2016 |
| Number of family and other unpaid caregivers | 15.5 million | 15.9 million | 15.9 million |
| Hours of unpaid care | 17.7 billion | 18.1 billion | 18.2 billion |
| Hours of care per caregiver per week | 21.9 h | 21.9 h | 21.9 h |
| Hours of care per caregiver per year | 1,139 h | 1,139 h | 1,139 h |
| Hourly rate | $12.45 | $12.25 | $12.65 |
| Total cost | $220.3 billion | $221.3 billion | $230 billion |