My understanding is that typically a threshold is set when calculating the number of people who would make asylum claims, who come into the levels. Usually a threshold is set, for any country 5%, or something, of a certain number of people who come into a country. Once it gets to that point we would start talking about a visa review. Has that number or percentage threshold changed for any countries over the last couple of years?
On February 15th, 2018. See this statement in context.