(Reuters) -More than 20 million Americans have so far signed up for health insurance through the Affordable Care Act’s (ACA) marketplace for this year, the highest since the inception of the law, according to data released on Wednesday. Over 3.7 million people who have signed up for the 2024 plans are new enrollees, data from the U.S. Department of Health and Human Services (HHS) showed. “Today is a momentous day. A record number of people in the United States have health care coverage through the Affordable Care Act’s Marketplace — more than at any point in history,” said HHS Secretary Xavier…