Because inclusion in the index requires at least three sources Afghanistan, Fiji, Liberia, Palestine, and Somalia, with only two sources in 2006, were not included.
Because inclusion in the index requires at least three sources Afghanistan, Fiji, Liberia, Palestine, and Somalia, with only two sources in 2006, were not included.
由于得出指数至少需要三个参数来源，而阿富汗、斐济、利比理亚、巴勒斯坦及索马里在2006年只有两个参数来源，因此未被囊括表中。