Angular button click with subscriber clean up

Question

If I have a button in the view that calls a function in the controller that gets data via a subscriber from an API service that is an observable, when the observable completes does it clean up the subscriber in the controller or will I have a stack of subscribers for each button click?

View

<button (click)="getData">Get Data</button>

Controller

public getData() {
   this.apiService.getTableData()
      .subscribe(data => {
         this.tableRows = data
      })
}

API Service

public getTableData(): Observable<any> {
  return new Observable(
            observer => {
                this.api.get().subscribe(
                    response => {
                        observer.next(response);
                        observer.complete();
                    },
                    error => {
                        observer.error(error);
                        observer.complete();
                    }
                );
            }
        );
}

This is stub code, I'm actually passing variables to the API service from the controller and view.

Thanks in advance.