How many employees who began working in 2009 or later had night shifts?
began work in 2009 or later refers to StartDate> = 2009;
SELECT COUNT(T1.BusinessEntityID) FROM EmployeeDepartmentHistory AS T1 INNER JOIN Shift AS T2 ON T1.ShiftId = T2.ShiftId WHERE T2.ShiftId = 3 AND STRFTIME('%Y', T2.StartTime) >= '2009'