Our new CO2 compilation appears on average to have gradually declined over time by about 3 - 4 ppm per million years. (newatlas.com)
While transfers from family members significantly declined over time in the treatment group, the relative decline was only on average 36 percent of the income supplement. (sciencedaily.com)
The average duration of an ETF does not decline over time. (blackrockblog.com)