Bayswater, London. The 2007 Worldcon in Yokohama, Japan, was the first to be held in Asia. Other non-US Worldcons held in the 21st century have included the 2003 Worldcon in Toronto, Ontario, Canada, the 2005 Worldcon, held in Glasgow, Scotland; the 2009 Worldcon, in Montreal, Quebec, Canada; the 2010 Worldcon, in Melbourne, Australia; the 2014 Worldcon, in London, United Kingdom and the 2017 Worldcon, in Helsinki, Finland. Sites for future Worldcons are determined by voting of the Worldcon membership. Worldcons through 1970 were selected one year in advance, from 1971 through 1986 two years in advance, from 1987 to 2007, three years in advance, then from 2008 to the present, two years in advance again. For example, during the 2011 Worldcon in Reno, San Antonio was selected to host the 2013 Worldcon. The rules changes to lengthen or shorten the period were implemented by selecting two future Worldcons at the 1969 and 1984 conventions and by having the 2005 convention not select any. To ensure that the Worldcon is relocated to different locations, the WSFS constitution requires that the proposed sites must all be at least away from the site of the convention at which the selection vote happens. When a Worldcon is held outside of North America, a North American Science Fiction Convention (NASFiC) may also be held within North America that same year. Since 1975, whenever a Worldcon site outside North America is selected, WSFS administers a parallel site selection process for the NASFiC, voted on by WSFS members at the Worldcon (or NASFiC if there is one) held one year prior to the prospective NASFiC. With the 2014 Worldcon being held in the United Kingdom, members at the 2013 Worldcon in San Antonio chose Detroit to be the site of the 2014 NASFiC and Spokane, Washington, as the site of the 2015 Worldcon. In 2020, The 78th Worldcon was held in Wellington, New Zealand. However, due to the COVID-19 pandemic, organizers announced during March 2020 that it would be a "virtual" con with attendees and panelists using video technologies to participate. In 2021, The 79th Worldcon took place in Washington, D.C. In 2022, the 80th Worldcon will be held in Chicago, Illinois. This was announced at the 2020 Worldcon, chosen by the members of the 78th Worldcon. Jeddah, Saudi Arabia was the other competing site. A group of writers and officers of the Worldcon have signed an