Mai i te tau 2019 ki te tau 2023, ko te tere tipu ā-tau toharite o te kaha whakaputa PVC he 1.95%, ā, kua piki ake te kaha whakaputa mai i te 25.08 miriona tana i te tau 2019 ki te 27.92 miriona tana i te tau 2023. I mua i te tau 2021, ko te whakawhirinaki ki ngā kawemai he tata ki te 4%, ko te nuinga nā te utu iti o ngā pūtake o tāwāhi me te uaua ki te whakakapi i ētahi hua utu nui.

I roto i ngā tau e toru o 2021-2023, i piki ake te kaha whakaputa PVC, ā, i tere hoki te pikinga o ngā kawemai, nā te mea i pāngia ētahi taputapu o tāwāhi e te āhuatanga kino, i pāngia te tuku, ā, kāore he painga whakataetae mārama o te utu, ā, i heke te whakawhirinaki ki te kawemai ki raro iho i te 2%. I taua wā anō, mai i te tau 2021, kua tere te whānui o te mākete kaweake PVC o Haina, ā, i raro i te painga utu, kua paingia e Īnia, Āhia ki te Tonga-mā-rāwhiti me ētahi atu whenua, ā, he nui ake te pānga o te āhua kaweake PVC ki te mākete o roto. Ko te tere piki haere o te kaha whakaputa o te rauemi ethylene he nui te ōwehenga, nā reira ka kaha ake te whakataetae i waenga i te konupūmā carbide me ngā hua tukatuka ethylene. Mai i te tirohanga o te tohatoha rohe o te kaha whakaputa hou, ko te kaha whakaputa hou i te tau 2023 e aro nui ana ki Shandong me Haina ki te Tonga.

I te tau 2023, ko te kaha whakaputa ā-tau e hāngai ana ki ngā umanga konupūmā waro, e 75.13% o te kaha whakaputa ā-motu, nā te mea he whenua nui ake te waro o Haina, he iti ake te hinu, ā, ko te nuinga o te waro e horahia ana ki te rohe raki-mā-uru, ko te raki-mā-uru e whakawhirinaki ana ki te waro nui, ngā rauemi konupūmā waro, ā, ko te nuinga o ngā umanga he whakaurunga tautoko, nō reira he nui te kaha whakaputa PVC i te rohe raki-mā-uru. Ko Haina ki te Raki, Haina ki te Rawhiti, Haina ki te Tonga i ngā tau tata nei, ko te kaha whakaputa hou ko te kaha whakaputa ethylene, nā te takutai moana, te watea o te kawe waka, te kawemai rauemi mata me te kawe waka.

Mai i te tirohanga ā-rohe, ko te rohe raki-mā-uru tonu te tuatahi me te 13.78 miriona tana o te kaha whakaputa. E ai ki ngā huringa ā-rohe, i tāpirihia e Haina ki te Tonga he 800,000 tana hei tāpiri i te āputa tono ā-rohe, i runga i tēnei kaupapa, i whakawhāitihia te whakawhiti rauemi i Haina ki te Raki ki te wāhi mākete o Haina ki te Tonga, i tāpirihia e Haina ki te Raki he huinga taputapu o te 400,000 tana anake, ā, kāore he kaha hou o ētahi atu rohe. I te katoa, i te tau 2023, ko Haina ki te Tonga, Haina ki te Raki me Haina ki te Raki anake ka piki ake, inā koa i Haina ki te Tonga, kei reira te pikinga o te kaha whakaputa he nui ake te pānga. Ko te kaha hou i te tau 2024 ka noho ki Haina ki te Rawhiti.

I waenganui i te tau 2019-2023, i haere tonu te whānui o te kaha o te umanga PVC o Haina, nā te pikinga o te hanga i ia tau i ngā tau tata nei, ā, i haere tonu te whānui o te kaha hanga PVC ā-rohe, ā, i roto i ngā tau e rima o te tau 2019-2023, kua piki ake te kaha o te 2.84 miriona tana.

Nā ngā panonitanga o te whānui haere o te kaha o Haina me ngā tauira tuku me te tono ki tāwāhi, ngā utanga moana me ētahi atu āhuatanga me ngā tohu, kua heke tonu ngā kawemai a Haina, ā, e matapaetia ana ka heke te whakawhirinaki ki ngā kawemai ki te 1.74% i te tau 2023. I te wā roa, me te pikinga ake o te tuku ā-rohe, me te whakapai ake i te kounga o ngā hua, ka tino whakaitihia te āputa tuku ā-rohe ā muri ake nei.