how has immigration changed since the 1960s?\no immigration was high in the 1960s, and has gradually…

how has immigration changed since the 1960s?\no immigration was high in the 1960s, and has gradually decreased.\no immigration was low in the 1960s, increased until 2000, and then decreased.\no immigration was high in the 1960s, decreased until 2000, and then increased.\no immigration was low in the 1960s, and has gradually increased.
Answer
Brief Explanations:
Históricamente, en la década de 1960, la inmigración era relativamente baja en muchos países occidentales. Con el tiempo, debido a factores económicos, políticos y sociales, la inmigración ha ido aumentando gradualmente.
Answer:
Immigration was low in the 1960s, and has gradually increased.