a    2017
b    Refers to the municipality of Phnom Penh including suburban areas.
c    2018
d    Estimate.
e    Phnom Penh
f    2016
g    Data refers to a 5-year period preceding the reference year.
h    2015
i    Data as at the end of December.
j    Data refer to fiscal years beginning 1 July.
k    2012 data are based on a health accounts study based on SHA2011. Numbers were converted to SHA 1.0 format for comparability.
l    2000
m    2014
n    2004
o    2008
p    2011
q    Partial data.
r    2002
s    Break in the time series.
t    Arrivals by all means of transport.