Tens of millions of people around the world operate as foreign workers. As of 2018, according to reports from the Bureau of Labor Statistics, there is an estimated 28 million foreign-born workers in the United States, which draws most of its immigrants from Mexico, including 4 or 5 million undocumented workers. It is estimated that around 5 million foreign workers live in northwestern Europe, half a million in Japan, and around 5 million in Saudi Arabia. Between January and June in 2019 2.4 million foreigners arrived to work in Russia.