One should keep in mind, as in previous editions,
that because the data are survey-based,
sampling error necessarily occurs. Statistically
significant changes can be concluded only if
the confidence intervals for the 2012 and 2014
scores do not overlap, which is only the case for
12 economies (table 1.8), with negative changes
mainly in high-income economies (Hong Kong
SAR, China; Singapore; and United Arab
Emirates), and middle-income but politically
unstable countries (Syrian Arab Republic and
Tunisia).