I te 9 o Noema, i pānuitia e te American Iron and Steel Association, i te marama o Hepetema 2021, ko te nui o ngā uta maitai o Amerika i eke ki te 8.085 miriona tana, he pikinga tau-ki-te-tau o te 21.3% me te hekenga marama-ki-te-marama o te 3.8%.
Mai i Hānuere ki Hepetema, ko te nui o ngā uta maitai i tukuna mai i te US he 70.739 miriona tana, he pikinga tau-ki-te-tau o te 17.0%.
Hei tāpiritanga, mai i Hānuere ki Hepetema, kua piki ake ngā tukunga rīpene ātete-waikura o te US mā te 19% i ia tau, kua piki ake ngā tukunga rīpene hurihuri-matao mā te 17% i ia tau, ā, kua piki ake ngā tukunga rīpene hurihuri-wera mā te 12% i ia tau.