Most of the increase was noted to have taken place in the late 1980s and 1990s (personal communication, Ford Fessenden, April 26, 2000).
(Most of the increase; was noted; ) (Most of the increase; to have taken; place; L:in the late 1980s and 1990s)
Most of the increase Most of the increase
was noted to have taken
place L:in the late 1980s and 1990s