a    2017
b    2018
c    2019
d    Estimate.
e    Calculated by the UN Statistics Division from national indices.
f    2016
g    Data refers to a 5-year period preceding the reference year.
h    Data as at the end of December.
i    2012
j    2009
k    2008
l    2006
m    Data are as at 1 January of reporting year.
n    Population aged 18 years and over.
o    2005
p    2013