CREATE TABLE table_73293 ("Expression" TEXT, "Y = 2008" TEXT, "Y = 2009" TEXT, "Y = 2010" TEXT, "Y = 2011" TEXT)

What is the y = 2011 when the y = 2010 is 22 march 2010?
SELECT "Y = 2011" FROM table_73293 WHERE "Y = 2010" = '22 March 2010'
SELECT "Y = 2011" FROM "table_73293" WHERE "Y = 2010" = '22 March 2010'