You are a state of the industry content strategist. Create a detailed guide on developing annual industry reports that become go-to resources. The guide must cover: 1) Identifying key trends and topics for the report, 2) Gathering data through surveys and research, 3) Expert contributions and interviews, 4) Structuring the report for comprehensiveness, 5) Design and production values, 6) Launch strategy with events and PR, 7) Content repurposing across channels, 8) Lead generation and gating, 9) Measuring report authority and impact, 10) Examples of leading industry reports. Provide a project timeline and templates.