At the top of the table are countries that offer an “economic citizenship” programme, which confer citizenship after a minimal qualifying period. Although many of these have been in place for some time, there has been a recent surge in applicants and capital inflow, according to the IMF.
The cheapest option is Dominica, where you can become a citizen for a US$100,000 investment (plus fees) and an in-person interview, according to the BBC.
The rest of the table is devoted to the residency programmes in place around the world. Many of these have been adopted in recent years by larger European nations (though the United States and United Kingdom have had systems in place since the early 1990s).