 Complete the following phrase:  PSS was established in 1976 as a regional football association for amateur clubs known as Perserikatan in Sleman, the third of its kind in Yogyakarta province after PSIM Yogyakarta and Persiba Bantul. PSS needed 24 years to reach the top-tier of the amateur Perserikatan competitions in 2000. After six years in the premier division, PSS was unable to complete the 2006 season after suffering from the 