CREATE TABLE table_16633 ("School" TEXT, "Location" TEXT, "Enrolment" FLOAT, "Founded" FLOAT, "Denomination" TEXT, "Day/Boarding" TEXT, "School Colours" TEXT, "Abbreviation" TEXT, "In competition since" FLOAT)

When was SPLC founded?
SELECT MIN("Founded") FROM table_16633 WHERE "Abbreviation" = 'SPLC'
SELECT MIN("Founded") FROM "table_16633" WHERE "Abbreviation" = 'SPLC'