1	Estes Park, Colorado, USA	1968
2	Snowmass-at-Aspen Colorado, USA	1970
3	Colorado Springs, Colorado, USA	1972
4	Steamboat Village, Colorado, USA	1974
5	Vail, Colorado, USA	1976
6	Estes Park, Colorado, USA	1978
7	Vail, Colorado, USA	1980
8	Steamboat Springs, Colorado, USA	1982
9	Colorado Springs, Colorado, USA	1984
10	Karlsruhe, Germany	1985
11	Vail, Colorado, USA	1986
12	Juan les Pins, France	1987
13	Grand Junction, Colorado, USA	1988
14	Jersey, Channel Islands, UK	1989
15	Boulder, Colorado, USA	1990
16	Jönköping, Sweden	1991
17	Beijing, China	1991
18	Breckenridge, Colorado, USA	1992
19	Christchurch, New Zealand	1994
20	Colorado Springs, Colorado, USA	1994
21	Moscow, Russia	1995
22	Fort Collins, Colorado, USA	1996
23	Tsukuba, Japan	1997
24	Monterey, California, USA	1998
25	Brest, France	1999
26	Nanjing, Jiangsu, P.R.. China	1999
27	Grand Junction, Colorado, USA	2000
28	Adelaide, Australia	2001
29	Westminster, Colorado, USA	2002
30	Saint Malo, France	2003
31	Fort Collins, Colorado, USA	2004
32	Karlsruhe, Germany	2005
33	Fort Collins, Colorado, USA	2006
34	Beaune, France	2007
35	Fort Collins, Colorado, USA	2008
36	Rotterdam, The Netherlands	2009

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