The number of years the business appears in the Historical Database, indicating how long it has been tracked over time.
Examples:
- 2 years: A local coffee shop that first appeared in the Historical Database in 2024, resulting in a
historical_year_countof 2 (2024–2026). - 20 years: A regional bank branch that has appeared in the Historical Database every year since 2006, resulting in a
historical_year_countof 20 (2006–2026).