CREATE TABLE table_74808 ("Year" FLOAT, "Driver" TEXT, "Nation of citizenship" TEXT, "Racing series" TEXT, "Type of vehicle" TEXT)

What Nation of citizenship has a stock car vehicle with a year of 2012?
SELECT "Nation of citizenship" FROM table_74808 WHERE "Type of vehicle" = 'stock car' AND "Year" = '2012'
SELECT "Nation of citizenship" FROM "table_74808" WHERE "Type of vehicle" = 'stock car' AND "Year" = '2012'