Within the past year and I don't have any current upgrade plans.
Between one and two years ago and I don't have any current upgrade plans.
Between two and three years ago and I don't have any current upgrade plans.
Between three and four years ago and I don't have any current upgrade plans.
More than four years ago and I don't have any current upgrade plans.
Within the past year and I plan to upgrade again in the next year.
Between one and two years ago and I plan to upgrade again in the next year.
Between two and three years ago and plan to upgrade again in the next year.
Between three and four years ago and I plan to upgrade again in the next year.
More than four years ago and I plan to upgrade again in the next year.