SJABC wrote:2000 = 1
2001 = 2
2002 = 3
2003 = 4
2004 = 5
2005 = 6
2006 = 7
2007 = 8
2008 = 9
2009 = 10
10 = Decade !
The first year was year one, not year zero. Ergo the first decade finished at the end of year 10, the 2nd decade satrted in year 11 and finished at the end of year 20. The first year of the 201st decade was 2001, it will finish in 2010.
Whilst I wasn't there but Psyber might have been

, The catch phrase on January 1, 1901 was a new new country for a new century when Australa was federated, i.e a country.
By claiming the end of the decade as 2009 the media are just giving themselves two years to do reviews of the decade, teams of the decade, images of the decade etc, which keeps us occupied in deceives people like A Mum on new years Eave in the ninth year of any particular decade.
So, in short we still have another year to go of the 201st decade AD.