a    2017
b    2019
c    2018
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    2014
j    2013
k    2011
l    Data are as at 1 January of reporting year.
m    Excluding private non-profit.
n    Excluding business enterprise.