(S (S (BASENP (EX There)) (VP (VBZ has) (VP (VP (VBN been) (NP (BASENP (DT an) (JJ overall) (NN decline)) (PP (IN of) (NP (QP (RB around) (NN 30)) (BASENP (NN per) (NN cent)))))) (PP (IN over) (BASENP (DT the) (JJ 33-year) (NN period)))))) (PERIOD .))