Its technically not a new decade. For it to be a new decade we need to finish the year 2010. Think of it as a race with 10 laps. Lap 1-2000,lap 2-2001,lap 3 2002, lap 4 2003, lap 5-2005, lap 6- 2006, lap 7- 2007, lap 8 2008, lap 9-2009, lap 10- 2010. We need to complete the lap for it to be a total of 10 laps. Do you know what i am saying?