a    Projected estimate (medium fertility variant).
b    Including Zanzibar.
c    2015
d    2017
e    Tanzania mainland only, excluding Zanzibar.
f    2016
g    Data classified according to ISIC Rev. 4.
h    Estimate.
i    Break in the time series.
j    Data refers to a 5-year period preceding the reference year.
k    Including refugees.
l    Data as at the end of December.
m    Data revision.
n    2002
o    2014
p    2013
q    2004
r    Partial data.
s    Excluding business enterprise.