The proportion of new depression cases detected by depression screening was estimated at 23 %. (beyondblue.org.au)
The researchers discovered that about 40 percent of people with high levels of depressive symptoms «recovered» and the same amount of people developed new depression symptoms at each follow - up visit. (sciencedaily.com)
Above that would be sediments, since hardened into rock, that were swept in as the ocean rushed into the vast new depression. (sciencemag.org)