Age is the tenth column on the Table of Diversity

The Table of Diversity uses the generations as a differentiator for various age groups.

"An individual's age is one of the most common predictors of differences in attitudes and behaviors. On issues ranging from foreign affairs to social policy, age differences in attitudes can be some of the widest and most illuminating. Age denotes two important characteristics about an individual: their place in the life cycle- whether a young adult, middle-aged parent or retiree- and their membership in a cohort of individuals who were born at a similar time.

Age cohorts give researchers a tool to analyze changes in views over time; they can provide a way to understand how different formative experiences interact with the life-cycle and aging process to shape people's view of the world. While younger and older adults may differ in their views at a given moment, age cohorts allow researchers to go further and examine how today's older adults felt about a given issue when they themselves were young, as well as to describe how the trajectory of views might differ across age cohorts."

Source: Pew Research Center: https://www.pewresearch.org/politics/2015/09/03/the-whys-and-hows-of-generations-research/