Ua hōʻike ʻia nā helu i hoʻokuʻu ʻia e ka International Stainless Steel Forum (ISSF) ma ʻOkakopa 7 i ka hapa mua o 2021, ua piʻi ka hana kila maka honua ma kahi o 24.9% i kēlā me kēia makahiki a i 29.026 miliona tons. Ma ke ʻano o kekahi mau ʻāpana, ua piʻi ka hana o nā ʻāpana āpau i kēlā me kēia makahiki: ua piʻi ʻo ʻEulopa ma kahi o 20.3% a i 3.827 miliona tons, ua piʻi ʻo ʻAmelika Hui Pū ʻIa ma kahi o 18.7% a i 1.277 miliona tons, a ua piʻi ʻo Kina nui ma kahi o 20.8% a i 16.243 miliona tons, koe naʻe ʻo Kina nui, ʻo ʻAsia me Kōlea Hema a me Indonesia (ʻo India nui, Iapana a me Taiwan) ua ulu ma kahi o 25.6% a i 3.725 miliona tons, a ʻo nā ʻāpana ʻē aʻe (ʻo Indonesia nui, Kōlea Hema, ʻApelika Hema, Brazil, a me Rusia) ua ulu ma kahi o 53.7% a i 3.953 miliona tons.

I ka hapaha ʻelua o 2021, ua like ka hana ʻana o ke kila kila maka honua me ka hapaha i hala. I waena o lākou, koe wale nō ʻo Kina nui a me ʻĀsia koe ʻo Kina, Kōlea Hema, a me Indonesia, ua emi ka lakio o kēlā me kēia mahina, a ua piʻi aʻe nā wahi nui ʻē aʻe i kēlā me kēia mahina.

Hana ʻana o ke kila kila maka (ʻāpana: tausani tone)