Write SQL query to solve given problem: How many people were there in the Engineering Department in the year 2009?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.BusinessEntityID) FROM Person AS T1 INNER JOIN EmployeeDepartmentHistory AS T2 ON T1.BusinessEntityID = T2.BusinessEntityID INNER JOIN Department AS T3 ON T2.DepartmentID = T3.DepartmentID WHERE T3.Name = 'Engineering' AND STRFTIME('%Y', T2.EndDate) > '2009' AND STRFTIME('%Y', T2.StartDate) < '2009'