Table:
text: Alpe d'Huez
Winners
Winners
Year_ Stage Start_of_stage Distance_km Category_of_climb Stage_winner Nationality Yellow_jersey Bend
2013 † 18 Gap 172.5 HC Christophe Riblon France Chris Froome 15
2011 19 Modane 109.5 HC Pierre Rolland France Andy Schleck 16
2008 17 Embrun 210.5 HC Carlos Sastre Spain Carlos Sastre 17
2006 15 Gap 187 HC Fränk Schleck Luxembourg Floyd Landis 18
2004 16 Bourg-d`Oisans 15.5 ( ITT ) HC Lance Armstrong United States Lance Armstrong 19
2003 8 Sallanches 219 HC Iban Mayo Spain Lance Armstrong 20
2001 10 Aix-les-Bains 209 HC Lance Armstrong United States François Simon 21
1999 10 Sestrières 220.5 HC Giuseppe Guerini Italy Lance Armstrong 1

Question: How many stage start entries are there for Alpe d'Huez in 2006?