Historical clue formulations

• Land next to Peru: Abbr. — 2017-04-02
• S. American land — 2010-12-26
• S. Amer. land — 2008-02-10
• Quito's land: Abbr. — 2008-01-08
• S. Amer. land — 2007-12-02
• O.A.S. member: Abbr. — 2006-05-07
• Land in S.A. — 2003-08-22
• Quito's country: Abbr. — 2003-08-04
• Its cap. is Quito — 2000-04-06
• Quito's country: Abbr. — 1998-12-30
• Andean land: Abbr. — 1996-10-03
• Neighbor of Peru: Abbr. — 1996-09-22
• S.A. country — 1995-05-21