CREATE TABLE table_19005 ("Rank" FLOAT, "Airport" TEXT, "Total Passengers" FLOAT, "% Change 2007/2008" TEXT, "International Passengers" FLOAT, "Domestic Passengers" FLOAT, "Transit Passengers" FLOAT, "Aircraft Movements" FLOAT, "Freight  (  Metric Tonnes  ) " FLOAT)

How many different total number of transit passengers are there in London Luton?
SELECT COUNT("Transit Passengers") FROM table_19005 WHERE "Airport" = 'London Luton'
SELECT COUNT("Transit Passengers") FROM "table_19005" WHERE "Airport" = 'London Luton'