a    Projected estimate (medium fertility variant).
b    The land area of Singapore comprises the mainland and other islands.
c    2019
d    2020
e    Excludes irrigation canals and landscaping care.
f    Excludes mining and quarrying.
g    Excludes repair of personal and household goods.
h    Estimate.
i    Data refers to a 5-year period preceding the reference year.
j    Data as at the end of December.
k    Data refer to fiscal years beginning 1 April.
l    Medisave is classified as Social insurance scheme, considering that it is a compulsory payment.
m    2018
n    2014
o    2016
p    2013
q    Data are as at 1 January of reporting year.
r    Population aged 7 years and over.
s    2017
t    Excluding Malaysian citizens arriving by land.