Montana is known for sweeping plains, towering mountains and expansive national parks. Soon, income inequality might be added to that list.

The Western state has the dubious distinction of ranking first nationwide when it comes to fastest-growing income inequality, according to a recent report from career website Zippia based on U.S. Census Bureau data.

Zippia

While income inequality appears to be worsening at a faster pace in Montana, residents there are still on a more level playing field than many other states. Montana only ranked 30th when it came to states with the highest level of income inequality. The top-ranked state on that list? New York, followed by Connecticut and Louisiana. Alaska had the lowest gap between high and low earners, according to Zippia’s report.

Montana, however, has seen the biggest increase in inequality in recent years. Between 2010 and 2016, the state’s Gini coefficient, which is a statistical measure of income inequality, increased 2.2 points. The state that exhibited the next-largest increase in income inequality over that timespan was California (up 1.9 points), followed by Rhode Island and Maine (up 1.8 points each).

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Coincidentally, Montana borders the two states that had the smallest changes in income inequality between 2010 and 2016: Wyoming and South Dakota.

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A shrinking middle class could explain Montana’s woes. A study from Pew Charitable Trusts found that the share of Montanans who earned a middle-class income dropped from 51.3% in 2000 to 46.6% in 2013. Much of the wage growth that’s occurred in the state in recent years has come from switching jobs rather than receiving raises, contributing to the disparity between the highest and lowest earners, according to the Billings Gazette.

The state also trails much of the country when it comes to its demand for workers with college degrees, which some say can also level the playing field in terms of income.