Simplify the following text for a Grade 7 native English-speaking person.
Original: The series has hosted its rounds since , with the exception of the 2004 closure , the circuit became the first to take place on an international level racetrack and the first of the three to take place on an F1 circuit .
Simplified: The series has hosted its rounds since 2003 , with the exception of the 2004 closure . The circuit became the first to take place on an international level racetrack and the first of the three to take place on an F1 circuit .