(S (S (BASENP (NN Demand)) (VP (VP (VP (VP (VBP overshot) (BASENP (NN supply))) (ADVP (RB first))) (PP (IN in) (BASENP (DT the) (NNS 1980s)))) (CC and) (VP (VBZ has) (VP (VBN been) (VP (VP (VBG increasing) (BASENP (DT every) (NN year))) (ADVP (RB since))))))) (PERIOD .))