Original sentence: Around 30% of Saudi's population of 27.3 million are immigrants from other countries.But with some unfair work practices such as sexual harassment, extreme working conditions, and other human rights violations, many try to escape their employers.E-commerce sites are being used for buying and selling maids online.In 2013, the government did not report any prosecutions or convictions of alleged human traffickers.In 2017, although there were 177 trafficking cases prosecuted, none were for sex trafficking.Runaways are often kidnapped and forced into prostitution.Saudi Arabia is a destination country for  women subjected to forced prostitution.Saudi Arabia is one of the largest consumers of domestic workers.The Law requires that all of the expatriates in Saudi Arabia should have an employment contract while they are in the country.The United States Department of State Office to Monitor and Combat Trafficking in Persons ranks Saudi Arabia as a 'Tier 2 Watch List' country