A trend that has been building steadily for a decade rarely fits inside a single news cycle, which means most coverage of it arrives in short bursts tied to a specific triggering event, rather than as an ongoing account of the slower pattern actually unfolding underneath that event.
The result is a strange kind of amnesia: readers encounter the same underlying trend repeatedly, each time as though it were new, without ever being shown the fuller decade-long shape that would put any single flare-up into proper context and proportion. Readers rarely notice the gap because each new flare-up arrives dressed as a fresh, isolated event rather than as another chapter in something considerably older.
Actively seeking out the longer view, a chart spanning years rather than a headline tied to a single week, is one of the more reliable ways to correct for this, since the short-headline version of a story is almost always a fragment rather than the whole, slower-moving picture underneath it.