Top 20 Most Hindu Countries

There are millions of foreign workers in Saudi Arabia and all Gulf countries. Most Saudi families of means employ a driver since women are not legally permitted to drive, and almost all of these drivers are Indian. Indians also work as bureaucrats and secretaries managing small businesses there; many of them work in IT, engineering, construction, and human resources; many female Indians work in Saudi as nurses or doctors since male staff are usually not permitted to treat female patients; there are quite a few Indian restaurants in the country (though more Pakistani); the cheap barbers are almost all Indian (but Saudis will tell you for the best service you should see a Turkish barber, which are slightly more expensive due to their reputation); and the public schools and lower-tier private schools that can't afford native-speaker teachers employ Indians as English teachers.

In addition there are quite a few Indian housemaids working in Saudi Arabia, though I think Saudis prefer Filipina, Indonesian, Malaysian, and African women as maids most of the time.

4 % would mean 10 million hindus - this is way too much