Job Recruitment Website - Ranking of immigration countries - A few years ago and a few years ago, which form was correct? If used correctly, under what circumstances, thank you.

A few years ago and a few years ago, which form was correct? If used correctly, under what circumstances, thank you.

My family and I immigrated to America a few years ago.

My family and I immigrated to America a few years ago.

As far as I know, it only lasted a few years.

As far as I know, it only lasted two or three years.

It is used online, but it was used more a few years ago, meaning "two or three years; A few years. "