When looking at average annual salaries in Iowa, there's not much of a difference between high school graduates and non-high school graduates. In fact, the difference in average annual pay is just $3,336, which is the smallest wage gap when comparing the two in the United States. The five largest gaps in average annual salary for high school graduates versus non-high school graduates would be found in Connecticut ($11,439), Alaska ($10,286), Massachusetts ($9,450), New Jersey ($9,350) and West Virginia ($9,046). The data is all here and laid out in this new infographic from the team at U.S. Career Institute, which shows how much high school graduates can expect to earn in each state in comparison to non-high school graduates. Not only that, but it includes data on how much people can make over their lifetimes at different education levels. According to the data, a high school graduate can make an average of $1,576,058.56 over their lifetime, while a non-high school graduate is looking at average lifetime earnings of $1,204,724.51.