The U.S. budget deficit likely will break the $1 trillion barrier in 2020, the first time that has happened since 2012, according to Congressional Budget Office estimates released Tuesday.

After passing that mark this year, the deficit is expected to average $1.3 trillion between 2021-30, rising from 4.6% of GDP to 5.4% over the period. That’s well above the long-term average since around the end of World War II. The deficit since then has not topped 4% of GDP for more than five consecutive years, averaging just 1.5% over the period.

As part of a spending pattern that the CBO deemed unsustainable, the national debt is expected to hit $31.4 trillion by 2030.