per capita
/ˈkæpɪtə/(亦作per caput /ˈkæpət/)
adverb & adjective
- for each person; in relation to people taken individually每人, 按人计算（地）的, 人均：
as adv. the state had fewer banks per capita than elsewhere按人头计算, 该州拥有的银行数要比其他地方少
as adj. per capita spending.人均花费。
词源
late 17th cent.: Latin, literally 'by heads'.