xa

Christmas Island (Indian Ocean)

xn

Macedonia

xb

Cocos (Keeling) Islands

xo

Slovakia

xc

Maldives

xp

Spratly Island

xd

Saint Kitts-Nevis

xr

Czech Republic

xe

Marshall Islands

xs

South Georgia and the South Sandwich Islands

xf

Midway Islands

xv

Slovenia

xh

Niue

xx

No place, unknown, or undetermined

-xi

Saint Kitts-Nevis-Anguilla

xxc

Canada

xj

Saint Helena

xxk

United Kingdom

xk

Saint Lucia

-xxr

Soviet Union

xl

Saint Pierre and Miquelon

xxu

United States

xm

Saint Vincent and the Grenadines