2007 (15) United States (11) Laramie County, WY Cass County, ND Pennington County, SD Oklahoma County, OK Jackson, MO St. Louis County, MO Pulaski County, AR Caddo County, LA Kanawha County, WV Lancaster County, NE Shawnee County, KS Japan (2) Sapporo, Hokkaido Kochi, Shikoku Canada (2) Westlock, Alberta Port McNeill, British Columbia 2008 (24) United States (14) Rockingham County, NH Cumberland County, ME Aroostook County, ME Richland County, SC Berkley County, SC Dakota County, MN Knox County, TN Delaware County, PA Lackawanna County, PA Kent County, DE New Castle County, DE Milwaukee County, WI Santa Fe County, NM Hillsborough County, NH Japan (3) Fukushima, Honshu Asahikawa, Hokkaido
Morioka, Honshu Canada (7) Fox Creek, Alberta Merritt, British Columbia Wawa, Ontario Amos, Quebec Swift Current, Saskatchewan Gander, Newfoundland Fredericton, Nova Scotia 2009 (24) United States (10) Allen County, IN Gloucester County, NJ Atlantic County, NJ Collin County, TX Linn County, IA Shelby County, AL Fayette County, KY Marietta County, GA Albany County, NY Douglas County, KS Japan (6) Nago, Honshu Osaka, Honshu Miyazaki, Kyushu Toshigi, Honshu Oita, Skikoku Kofu, Honshu Canada (8) New Hazelton, British Columbia Yorkton, Saskatchewan Pierceland, Saskatchewan Portage la Prairie, Quebec Dauphin, Quebec New Glasglow, Nova Scotia Victoria, British Columbia Churchill, Manitoba