The bar chart illustrates the percentage of the total population in the United States aged 65 and over from 1900 to 2000.
Overall, there has been a noticeable increase in the proportion of older adults within the American population over the specified century, with variations observed among distinct age groups.
In 1900, the percentage of individuals aged 65-74 was 2.9%, gradually increasing to 7.3% by 1980, and maintaining this level until 1990. Overall, this age group experienced a substantial rise, totaling an increase of 4.4 percentage points over the century. Conversely, the segment of the population aged 75-84 started at 1.0% in 1900 and saw growth to 4.4% by 2000, representing a significant increase of 3.4 percentage points. Similarly, the oldest age group, 85 and above, commenced at a mere 0.2% in 1900 and incrementally increased to 1.5% in 2000, albeit with the lowest rise of only 1.3 percentage points.
Throughout the examined period, the total percentage of adults aged 65 and over escalated from 4.1% in 1900 to 12.4% by the year 2000. This trend reflects a growing demographic shift towards an older population, although the majority of this growth is concentrated in the 65-74 age category. Notably, the data indicate that the increase in the proportion of individuals aged between 65 and 74 accounts for a more substantial share of this trend than that of the 75+ cohort, suggesting a younger demographic is predominant within the older population. The evidence presented underscores the relative scarcity of the most senior segment of the population aged 85 and older, indicating a lesser presence in the aging demographic landscape of the United States.