Final answer:
The oldest baby boomer turned 65 in the year 2011, marking the beginning of a significant demographic shift in the U.S. with implications for healthcare needs.
Step-by-step explanation:
The oldest baby boomer turned age 65 in the year 2011. Baby boomers are defined as the cohort born between 1946 and 1964. According to U.S. Census data, in 2010, the largest population group was the age bracket of forty-five to sixty-five, which indicates that the oldest boomers were reaching age 65 around that time. By 2011, the very first baby boomers, born in 1946, had reached the age of 65. This demographic shift has significant implications for healthcare, as baby boomers are expected to need increased medical attention as they enter what is considered elderly age.