The United States could suspend all legal immigration to the country for the next 40 years and maintain a workforce where there are still more than two U.S. workers for every one retiree, a new study finds.

The latest study by the Center for Immigration Studies’ Steven Camarota reveals that despite claims by the big business lobby, Wall St., and corporate executives that mass legal immigration is necessary to maintain a sizeable workforce, current legal immigration trends have little to no impact on the working-age population.

The workforce population is generally measured by the ratio showing the number of U.S. workers per every one retiree. Camerota’s research finds that if the U.S. implemented an immigration moratorium for the next 40 years, it would hardly have an impact on the number of workers per retirees.

For example, at current legal immigration levels where the U.S. imports more than 1.2 million legal immigrants a year — at the detriment of American workers’ job prospects and wages — the working-age population would decrease from 64.3 percent of the total population in 2017 to 59 percent in 2060.

Likewise, under a scenario where the U.S. halted all legal immigration, the working-age population would dip to about 56.7 percent of the total population by 2060 — only a 2.3 percent difference from projections where current mass legal immigration trends continue.

The ratio of U.S. workers per retiree would be little changed if lawmakers halted legal immigration for 40 years. With current legal immigration levels, the U.S. is on track to have about 2.5 workers per retiree by 2060.

Should legal immigration be halted, the U.S. would have about 2.1 workers per retiree by 2060, a subtle difference in the working-age population.

At the same time, continuing current legal immigration levels for the next 40 years would dramatically increase the total U.S. population to an unprecedented 404.5 million by 2060. This would mean that in less than half a century, 80 million residents would be added to America’s population due to current legal immigration levels.

If the U.S. implemented an immigration moratorium for the next four decades, though, the U.S. population would stabilize at a healthy 329.2 million — an increase of only about four million residents.

As Breitbart News has reported, immigration moratoriums are not uncommon in American history. Currently, there are 44.5 million foreign-born residents living in the country, a 108-year record high. This comes after about four decades of mass legal immigration to the U.S. that, if continued, is likely to hand electoral dominance to Democrats.

The country’s last immigration boom — between 1900 and 1920 — was eventually met with a near immigration moratorium. Between 1925 and 1966, the yearly U.S. legal immigration level did not exceed 327,000 admissions, a four-decades-long near moratorium that allowed the massive inflows of immigrants from before 1925 the ability to assimilate.