Britons never made up more than a small portion of the population in Hong Kong, despite Hong Kong having been under British rule for more than 150 years. However, they did leave their mark on Hong Kong's institutions, culture and architecture. The British population in Hong Kong today consists mainly of career expatriates working in banking, education, real estate, law and consultancy, as well as many British-born ethnic Chinese, former Chinese émigrés to the UK and Hong Kongers (mostly ethnic Chinese) who successfully applied for full British citizenship before the transfer of sovereignty in 1997.