a    2017
b    Refers to the Delhi metropolitan area that is not restricted to state boundaries (National Capital Territory), includes contiguous suburban cities and towns, such as Faridabad, Gurgaon, and Ghaziabad.
c    2019
d    2018
e    Data classified according to ISIC Rev. 4.
f    Excludes publishing activities. Includes irrigation and canals.
g    Excludes computer and related activities and radio/TV activities.
h    Excludes repair of personal and household goods.
i    Estimate.
j    Industrial workers.
k    2016
l    Data refers to a 5-year period preceding the reference year.
m    Including refugees.
n    Data as at the end of December.
o    Data refer to fiscal years beginning 1 April.
p    Break in the time series.
q    2014
r    2013
s    Data are as at 1 January of reporting year.
t    Population aged 18 years and over.
u    Excluding nationals residing abroad.
v    Including nationals residing abroad.