Footnotes  
a    2017
b    2018
c    Estimate.
d    2016
e    Data refers to a 5-year period preceding the reference year.
f    2015
g    Including refugees.
h    Data as at the end of December.
i    2009
j    2013
k    2002
l    Break in the time series.
m    S&T budget instead of R&D expenditure.
n    Government only.
o    Partial data.
p    2004
q    2014
r    Arrivals by air.