CREATE TABLE table_35253 ("Rank" FLOAT, "Airport" TEXT, "Location" TEXT, "Code  ( IATA ) " TEXT, "Total Cargo  ( Metric Tonnes ) " TEXT, "2003 Rank" TEXT, "% Change" TEXT)

What is the % Change at London Heathrow airport?
SELECT "% Change" FROM table_35253 WHERE "Airport" = 'london heathrow airport'
SELECT "% Change" FROM "table_35253" WHERE "Airport" = 'london heathrow airport'