Because the data in the 35 indicators which make up the Good Country Index are collected in different forms and at different times for different reasons, it’s impossible to focus the Index on any single year – some indicators report on things which have happened during the previous year, a few of them are constantly updated, and some of them relate to behaviours which may have taken place up to a decade earlier.
Also, the big datasets produced by United Nations agencies and other international bodies typically take several years to compile, analyse and publish, which is not surprising if you're collecting large amounts of complex data from nearly two hundred countries.
For these reasons, we’ve used mostly 2011 data (with the exception of 1 indicator) to provide a baseline for the latest edition of the Good Country Index (Edition 1.1). It’s as close as the available data allows to a complete portrait of the world at any point in time. For the earlier edition (Edition 1.0) we’ve used mostly 2010 data.