Kwiminyaka yakutshanje, uphuhliso loshishino lwePVC lungene kwibhalansi ebuthathaka phakathi kokubonelela kunye nemfuno. Umjikelo weshishini wePVC waseTshayina unokwahlulwa ube ngamanqanaba amathathu. 1.2008-2013 Ixesha lokukhula kwesantya esiphezulu somthamo wemveliso yoshishino. 2.2014-2016 imveliso umthamo ukurhoxiswa ixesha2014-2016 imveliso umthamo ukurhoxiswa ixesha 3.2017 ukuya kwixesha langoku imveliso balance, ibhalansi buthathaka phakathi unikezelo kunye nemfuno.
