The state that gained the most millionaires in 2013 is North Dakota, reports the Wall Street Journal.

Not known as a place of glamour, it isn’t luxury shopping or high culture that breeds millionaires in this Midwestern state, but oil and gas.

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There were 53,000 more American households with more than $1 million in investible assets in 2013, compared to the year prior, says the WSJ.

While North Dakota rose from 43rd to 29th in the ranks, Maryland, Connecticut, New Jersey still have the most millionaires per capita.

For the rest of the list, and an interactive map, click here.

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