(S (S (S (S (BASENP (DT Both) (NNS areas)) (VP (VBD had) (BASENP (VBG increasing) (NN rates)))) (SBAR (IN until) (S (BASENP (DT the) (JJ southern) (NN side)) (VP (VBD started) (S (VP (TO to) (VP (VB fall) (PP (IN in) (BASENP (DT the) (NNS '90s)))))))))) (CONJP (COMMA ,) (CC and)) (S (PP (IN in) (BASENP (JJ recent) (NNS years))) (S (BASENP (DT the) (NN gap)) (VP (VBZ has) (VP (ADVP (RB significantly)) (VBN increased)))))) (PERIOD .))