Not sure what your point is; there’s still plenty of violence against healthcare workers, so whether general trends are up or down is irrelevant. The problem exists, and if it is a percentage point or two up or down compared to years past doesn’t address the current problem, which is that workers are subject to violence all too often.
And it isn’t all healthcare workers who are at the top of the numbers; being a HS teacher is pretty dangerous, too(let alone being a bus driver):
https://www.bjs.gov/content/pub/pdf/wv09.pdf