Past Ph.D. Qualifiers January 2005 May 2005 January 2006 May 2006 January 2007 July 2007 May 2008 July 2008 May 2009 July 2009 May 2010 July 2010 July 2011 May 2012 July 2012 May 2013 July 2013 May 2014 July 2014 May 2015 August 2015 May 2016 July 2016 May 2017 July 2017 May 2018 July 2018 May 2019 July 2019 June 2020 August 2020