That 500,000 number is a crock of shit, by the way. 500,000 smokers die each year, from all causes. If a smoker dies from getting struck by lightning, that’s counted in the 500,000.
An estimated 42.1 million people smoke in the US. (18% of the adult population)
Around 2.5 million people die each year
What’s 18% of 2.5 million? 450,000.