18 (2016)

17 (2015)

16 (2014)

15 (2013)

14 (2012)

13 (2011)

2010: Megaliths and Identities

12 (2010)

11 (2009)

10 (2008)

9 (2007)

8 (2006)

7 (2005)

6 (2004)

5 (2003)

2002: Leinetal

4 (2002)

2–3 (2000–2001)

1999: Calden

1 (1999)