Translation of "Predominantly" in Japanese

It's an area that is predominantly black and low-income,

主に黒人と低所得者が 住んでいる地域で

It's a profession that is 92 percent white and predominantly male,

92%が白人で 男性が大多数を占める職業です

However, like America, Japan is predominantly a middle-class, middle-income country, and so wives do not employ maids, but attend to everything themselves.

しかし、アメリカ同様日本も中流階級の平均的収入の人々が圧倒的多数を占める国なので、妻たちはメイドを雇わず、自分で何もかもに励む。