The US Naval Institute News has published a chart, prepared by the USCG, listing their best estimate of the world icebreaker fleets. Ships are listed by country, horsepower class, and year the ship entered service. Ships under construction or planned are also listed.
Only ships of more than 10,000 Brake Horse Power (7,457 MW), capable of independent Arctic operation, are included. There are notations to indicate nuclear propulsion, whether the ship has made it to the North Pole, whether it is government owned, and if the ship is designed specifically for the Baltic.