Laga soo bilaabo 2010 ilaa 2014, mugga dhoofinta PVC ee Shiinaha wuxuu ahaa qiyaastii 1 milyan oo tan sannad kasta, laakiin laga bilaabo 2015 ilaa 2020, mugga dhoofinta PVC ee Shiinaha ayaa hoos u dhacay sannad kasta. Sannadkii 2020, Shiinaha wuxuu dhoofiyay ku dhawaad 800000 tan oo PVC ah, laakiin sannadkii 2021, saameynta cudurka faafa ee adduunka awgeed, Shiinaha wuxuu noqday dhoofinta PVC ee ugu weyn adduunka, iyadoo mugga dhoofinta uu ka badan yahay 1.5 milyan oo tan.
Mustaqbalka, Shiinuhu wuxuu weli ka ciyaari doonaa doorka ugu muhiimsan ee dhoofinta PVC-ga adduunka oo dhan.