I read this as 2020 was Covid related drop, it then returned to normal for 2 years, then began dropping again in late 2023. The covid blip is explained by what was going on at the time, nothing since 2023 has any explanation and could be flock

COVID makes it spike up (after a months long downward trend long before the cameras), not down. Nation-wide, incidentally.

The cameras were added where the black rectangle is here: https://imgur.com/a/i00Gna0