Most states in the United States ended 2015 on an economic upswing, with the exception of seven – including Louisiana, according to a report.

New data from the Philadelphia Fed shows that seven states saw their economies shrink in 2015, according to the Washington Post. Those seven states are Louisiana, North Dakota, Wyoming, Wisconsin, Illinois, Mississippi and Alaska.

The data measures employment, hours worked in manufacturing and the unemployment rate for each state.

Historically low oil prices can be blamed for Louisiana’s sluggish economy, along with the economies in North Dakota, Wyoming, Alaska and Mississippi, the Post reported.

Read the full Washington Post report here.