Was it better in the old days? Men's 10k performance 1997-2008

Sibbo asked me to have a look at the average times for the top 10 male 10k runners over the last 10 years. Here are the results over the last 12 years.

Year	Av of Top 10
2008	00:36:52
2007	00:36:09
2006	00:37:32
2005	00:37:01
2004	00:37:31
2003	00:36:34
2002	00:36:28
2001	00:36:44
2000	00:36:54
1999	00:36:37
1998	00:36:55
1997	00:36:20