Recent Census Bureau data reveals that only 1 in 10 Americans moved between 2015 and 2016, marking the lowest level of renters or homeowners to relocate since the agency started keeping track of data in 1948, a trend exacerbated by the housing crash — which led Americans to be cautious and cling to their homes and rentals.

Yale Law School professor David Schleicher said homeownership subsidies, more land-use restrictions, the increased use of occupational licensing and municipal bankruptcies are the main culprits, Construction Dive reports. Schleicher said relocation subsidies targeting residents trapped in poor areas could help create more movers.

While the overall mover rate is low, more affordable regions of the country, like parts of the South, Midwest and Rust Belt, experienced increases in migration. According to Realtor.com, smaller markets, including Denver, Nashville and Orlando, are likely to see housing demand grow this year.