The Figure shows that incidence rates decreased after – years since immigration for immigrants from most of the countries. Subsequently, the incidence rates were mostly stable from to years since immigration for the countries with initial incidence rates above or around 50/100,000 (as a general rule, immigrants from countries with incidence rates above this level are eligible for screening). African immigrants, especially Somalis, had the highest incidence rates. Since few Somalis immigrated before 1991, the observed increase in incidence rates years after immigration has wide confidence intervals. In contrast to the incidence rates for most of the countries, incidence rates for immigrants from Suriname and the Netherlands Antilles were initially.
