Package name. Omit it for the whole registry's download total.

Window: `last-day`, `last-week`, `last-month` or `last-year`. Default: `last-week` unless `from`/`to` are given.

First day of the range, `YYYY-MM-DD`. Download data starts on 2015-01-10; a `from` after today is refused. A range spans up to 18 months; a longer range keeps its newest 18 months and sets `clamped`.

Last day of the range, `YYYY-MM-DD`. Must be on or after `from`; a `to` before 2015-01-10 is refused. A range spans up to 18 months; a longer range keeps its newest 18 months and sets `clamped`.

`total` for one number, `daily` for one row per day. Default: `total`.