CREATE TABLE table_56912 ("Year" TEXT, "2010" FLOAT, "2009" FLOAT, "2008" FLOAT, "2005" FLOAT, "2000" FLOAT)

Tell me the lowest 2005 for 2010 less than 21 for 2009 being 19
SELECT MIN("2005") FROM table_56912 WHERE "2009" = '19' AND "2010" < '21'
SELECT MIN("2005") FROM "table_56912" WHERE "2009" = '19' AND "2010" < '21'