Ummmm . . . probably the same as 1970 - 2005?
Qantas employed about 85 cadets in 94/95.- they were trained from '90-'92. They employed a dozen or so each year from about ''99 through until 2008. They were employing cadets in the early '70s too though I think they mostly trained from '68 through to '72.
Cadets are a viable source of recruits if the industry isn't able to supply enough of the right sort of people. Whether the industry can do that at the moment is somethong for another day.