Conservative
Jan. 1, 2008 to May 5, 2011
May 5, 2011 to May 7, 2015
May 7, 2015 to May 2, 2019
May 2, 2019 to May 4, 2023
May 4, 2023 to Present
May 6, 1999 to May 1, 2003
May 1, 2003 to May 3, 2007