With the Ballon d'Or shortlist to be announced on Tuesday, Harry Kane heads the field as the bookmakers' favourite after a prolific season for club and country. History, however, suggests football's biggest individual prize is rarely decided on goals alone.Since the Ballon d'Or was first awarded in 1956, performances in the game's biggest competitions have consistently shaped the outcome. World Cup years, in particular, have followed a remarkably clear pattern and recent editions have shown just