There's a jump in Covid times but you can see on the graph that it started around 2011, which is about the same time US life expectancy started stagnating. It's

There's a jump in Covid times but you can see on the graph that it started around 2011, which is about the same time US life expectancy started stagnating. It's interesting that Australia has a life expectancy of 83 years, 7 years more than America (before Covid this was 4 years, and I expect America to bounce back up because it affected elderly people more). Australians are only 4% less obese and 4% less overweight than Americans. However the percentage of Australians that are morbidly obese (BMI over 35) is 9.4%, and for Americans that's 18% - so the obese people in America are more likely to be really obese. Alternatively it could be to do with Americans being less likely to go to the doctor or have operations done due to higher healthcare costs.