CREATE TABLE table_203_638 (id DECIMAL, "score" DECIMAL, "2007" TEXT, "2008" TEXT, "2009" TEXT, "2010" TEXT, "2011" TEXT, "2012" TEXT, "2013" TEXT)

which score consecutively had the highest percentage of students in it each year ?
SELECT "score" FROM table_203_638 ORDER BY "2007" DESC LIMIT 1
SELECT "score" FROM "table_203_638" ORDER BY "2007" DESC NULLS LAST LIMIT 1