-owned ship may be placed on the register.

Internal register--A register of ships maintained as a subset of a national
register. Ships on the internal register fly the national flag and have that
nationality but are subject to a separate set of maritime rules from those on
the main national register. These differences usually include lower taxation of
profits, manning by foreign nationals, and, usually, ownership outside the flag
state (when it functions as an FOC register). The Norwegian International Ship
Register and Danish International Ship Register are the most notable examples of
an internal register. Both have been instrumental in stemming flight from the
national flag to flags of convenience and in attracting foreignowned ships to
the Norwegian and Danish flags.

Merchant ship--A vessel that carries goods against payment of freight; commonly
used to denote any nonmilitary ship but accurately restricted to commercial
vessels only.

Register--The record of a ship's ownership and nationality as listed with the
maritime authorities of a country; also, the compendium of such individual
ships' registrations. Registration of a ship provides it with a nationality and
makes it subject to the laws of the country in which registered (the flag state)
regardless of the nationality of the ship's ultimate owner.

Money figures: All are expressed in contemporaneous US dollars unless otherwise
indicated.

National product: The total output of goods and services in a country in a given
year. See Gross domestic product (GDP), Gross national product (GNP), and
GNP/GDP methodology.

Net migration rate: The balance between the number of persons entering and
leaving a country during the year per 1,000 persons (based on midyear
population). An excess of persons entering the country is referred to as net
immigration (3.56 migrants/1,000 population); an excess of persons leaving the
country as net emigration (-9.26 migrants/1,000 population).

Population: Figures are estimates from the Bureau of the Census based on
statistics from population censuses, vital registration systems, or sample
surveys pertaining to the recent past, and on assumptions about future trends.

Total fertility rate: The average number of children that would be born per
woman if all women lived to the end of their childbearing years and bore
children according to a given fertility rate at each age.

Years: All year references are for the calendar year (CY)