I don't understand how to account for the fact that total vehicle sales in the US has not been dropping over the last 40 years despite stats like this from the

I don't understand how to account for the fact that total vehicle sales in the US has not been dropping over the last 40 years despite stats like this from the article: "By 1997, 43% of the country’s 16-year-olds had driving licences. But in 2020, the most recent year for which figures are available, the number had fallen to just 25%. Nor is it just teenagers. One in five Americans aged between 20 and 24 does not have a licence, up from just one in 12 in 1983. " US vehicle sales numbers: https://fred.stlouisfed.org/series/TOTALSA https://fred.stlouisfed.org/series/TOTALSA The article states it's baby boomers that account for increasing traffic on the road. So baby boomers are buying more cars per capita as they age? So much so that it's offsetting these dramatic drops from the younger generations? I find that really hard to believe so maybe I'm missing something. Anyone able to explain?