Originally Posted By: L. Brown

And 10% was about the annual rate of increase from 1987 (after the DDT ban but before the lead shot ban) to 1991, when lead shot was banned.


That is incorrect. DDT was banned for all agricultural use in the United States in 1972, which represented all but a small fraction of it's annual use. True, it was used for very limited "public health" (i.e. flea, bedbug, etc. infestations within dwellings) circumstances until 1987. However that specific usage had very limited, if any, relationship to it's impact on bald eagles compared to it's agricultural use.

1972 is the date you need to use.

“I left long before daylight, alone but not lonely.”~Gordon Macquarrie