The phrase "reported decline" means that certain information or data has been shared or documented, showing a decrease or reduction in something. Full definition
A staggering 67 % of couples reported a decline in marital satisfaction after the arrival of the baby. (divorcesource.com)
Still, the fact that 12 percent reported a decline in sales for 2012 indicates that the dealer community still faces some challenges on its path back to prosperity. (fesmag.com)