港口城市最多的国家?是哪？

Russia 33,
Aleksandrovsk-Sakhalinskiy, Arkhangel'sk, Astrakhan', De-Kastri, Indigirskiy, Kaliningrad, Kandalaksha, Kazan', Khabarovsk, Kholmsk, Krasnoyarsk, Lazarev, Mago, Mezen', Moscow, Murmansk, Nakhodka, Nevel'sk, Novorossiysk, Onega, Petropavlovsk-Kamchatskiy, Rostov, Shakhtersk, Saint Petersburg, Sochi, Taganrog, Tuapse, Uglegorsk, Vanino, Vladivostok, Volgograd, Vostochnyy, Vyborg

United Kingdom 23,
Aberdeen, Belfast, Bristol, Cardiff, Dover, Falmouth, Felixstowe, Glasgow, Grangemouth, Hull, Leith, Liverpool, London, Manchester, Peterhead, Plymouth, Portsmouth, Ramsgate, Scapa Flow, Southampton, Sullom Voe, Teesport, Tyne

United States 22,
Aberdeen, Belfast, Bristol, Cardiff, Dover, Falmouth, Felixstowe, Glasgow, Grangemouth, Hull, Leith, Liverpool, London, Manchester, Peterhead, Plymouth, Portsmouth, Ramsgate, Scapa Flow, Southampton, Sullom Voe, Teesport, Tyne

Japan 21,
Akita, Amagasaki, Chiba, Hachino