Looking at figures in Wikipedia, compiled by Amnesty International, foreigners have been always in the minority, except for one year recently (2007) when two people out of three were foreigners. This became possible because the number of executions has dropped drastically since 1990's (from around 70 per year to around 3-7 per year; in 2010 it was zero). If the number is 1 and the one happens to be foreigner some year, then the foreigner rate will be 100 %.