The U.S. fertility rate has dropped for the seventh year in a row.

Americans are now having so few babies that the population will be sent into decline without immigration, according to new government numbers.

Recent data from the Centers for Disease Control and Prevention (CDC) shows that the annual rate of births per 1,000 women of childbearing age was hitting at just 1,765.5, or 16% below the number needed to keep the population stable without immigrants, showing that the U.S. fertility rate dropped for the seventh year in a row.

The total fertility rate has been declining year on year since 2010, but the numbers for 2017 represent the biggest drop in recent history. Experts say the decline is due to changing economics, delays in childbirth by women pursuing jobs and education, the greater availability of contraception, and a decline in teen pregnancies.

Fertility per region and state

The CDC analyzed the total fertility rates along numerous demographics, including location and race, finding that only two U.S. states witnessed rates above replacement level: South Dakota and Utah. The District of Columbia held the lowest rate, with 1,421 births per 1,000 women.

Among white women inside the country, no states had a total fertility rate (TFR) above the replacement level; 12 states had TFRs for black women above replacement; and among Hispanic women, 29 states had TFRs above 2,100.

For the first time, the majority of new moms in the U.S. are over 30.

The CDC’s National Survey of Family Growth also found that over 7 million women (12% of American women of reproductive age) now seek fertility treatment services.

According to a Technavio research report, the global fertility services market is expected to grow to $21 billion by 2020, with an annual growth rate of almost 9%.