The "/reports" page:

Shows activity reports for the repository.

Query Parameters:

  view=REPORT_NAME  Valid values: bymonth, byyear, byuser
  user=NAME         Restricts statistics to the given user
  type=TYPE         Restricts the report to a specific event type:
                    ci (check-in), w (wiki), t (ticket), g (tag)
                    Defaulting to all event types.

The view-specific query parameters include:

view=byweek:

  y=YYYY            The year to report (default is the server's
                    current year).