The uninsured rate in the country increased until 2010. Since then, the introduction of the Affordable Care Act (ACA) has caused a decline. The most significant drop was in 2016. The provision changes in the ACA triggered it, and the numbers were at their lowest at 10%.
Unfortunately, the number of people without health insurance began climbing again in 2017 and peaked in 2019. The downward trend has continued and sat at 9.2% in 2021.