Possible Clues:

• Points to raise in a Baltic country
• A country seat? No, I suspect
• 1991 joiner of the United Nations
• State established on island area
• English girl's little time in Baltic state
• Country school including minimum of science - reverse of very good
• European republic, became independent again in 1991
• European Union member since May 2004
• Land on the Gulf of Finland
• Country established above Riga, regularly visited?