a    Projected estimate (medium fertility variant).
b    Land area only.
c    2015
d    2017
e    2016
f    Estimate.
g    Index base: fiscal (solar) year 2016 (21 March 2016 - 20 March 2017)=100.
h    Year ending 20 March of the year stated.
i    Data include oil and gas. The value of oil exports and total exports are rough estimates based on information published in various petroleum industry journals.
j    Data refers to a 5-year period preceding the reference year.
k    Including refugees.
l    Data as at the end of December.
m    Provisional data.
n    2014
o    2004
p    2009
q    Population aged 6 years and over.
r    Excluding government.
s    Excluding private non-profit.
t    2012