Numbers of arrests in Guilderland, which had dropped in 2020 — for juveniles (48 in 2020 to 60 in 2021), drunk driving (33 to 50 in 2021), traffic summons (785 more than double to 1,620 in 2021), property-damage crashes (872 in 2020 to 1,033 in 2021) — all rebounded last year after plummeting during the start of the pandemic.