Historical Distributions

For Quarter Ended Record Date Payment Date Amount Type March 31, 2013 May 7, 2013 May 15, 2013 $ 0.83 Cash Distribution December 31, 2012 February 6, 2013 February 14, 2013 $ 0.82 Cash Distribution September 30, 2012 November 7, 2012 November 14, 2012 $ 0.81 Cash Distribution June 30, 2012 August 6, 2012 August 14, 2012 $ 0.80 Cash Distribution March 31, 2012 May 7, 2012 May 15, 2012 $ 0.79 Cash Distribution December 31, 2011 February 6, 2012 February 14, 2012 $ 0.76 Cash Distribution September 30, 2011 November 7, 2011 November 14, 2011 $ 0.73 Cash Distribution June 30 , 2011 August 1, 2011 August 12 , 2011 $ 0.70 Cash Distribution March 31, 2011 May 2, 2011 May 13, 2011 $ 0.67 Cash Distribution December 31, 2010 February 7, 2011 February 14, 2011 $ 0.65 Cash Distribution September 30, 2010 November 8, 2010 November 12, 2010 $ 0.64 Cash Distribution June 30, 2010 August 2, 2010 August 13, 2010 $ 0.64 Cash Distribution March 31, 2010 May 3, 2010 May 14, 2010 $ 0.64 Cash Distribution December 31, 2009 February 5, 2010 February 12, 2010 $ 0.64 Cash Distribution September 30, 2009 November 2, 2009 November 13, 2009 $ 0.64 Cash Distribution June 30, 2009 August 3, 2009 August 14, 2009 $ 0.64 Cash Distribution March 31, 2009 May 4, 2009 May 15, 2009 $ 0.64 Cash Distribution December 31, 2008 February 6, 2009 February 13, 2009 $ 0.64 Cash Distribution September 30, 2008 November 4, 2008 November 14, 2008 $ 0.64 Cash Distribution June 30, 2008 August 4, 2008 August 15, 2008 $ 0.63 Cash Distribution March 31, 2008 May 5, 2008 May 15, 2008 $ 0.60 Cash Distribution December 31, 2007 February 7, 2008 February 14, 2008 $ 0.57 Cash Distribution September 30, 2007 November 8, 2007 November 14, 2007 $ 0.55 Cash Distribution June 30, 2007 August 8, 2007 August 14, 2007 $ 0.53 Cash Distribution March 31, 2007 May 9, 2007 May 15, 2007 $ 0.51 Cash Distribution February 22, 2007 February 28, 2007 2-for-1 Unit Split * December 31, 2006 February 9, 2007 February 21, 2007 $ 0.50 Cash Distribution September 30, 2006 November 9, 2006 November 21, 2006 $ 0.49 Cash Distribution June 30, 2006 August 14, 2006 August 21, 2006 $ 0.46 Cash Distribution March 31, 2006 May 26, 2006 June 5, 2006 $ 0.44 Cash Distribution December 31, 2005 February 15, 2006 February 22, 2006 $ 0.41 Cash Distribution September 30, 2005 November15, 2005 November 22, 2005 $ 0.41 Cash Distribution June 30, 2005 August 15, 2005 August 22, 2005 $ 0.40 Cash Distribution March 31, 2005 May 16, 2005 May 23, 2005 $ 0.40 Cash Distribution December 31, 2004 February 9, 2005 February 21, 2005 $ 0.39 Cash Distribution September 30, 2004 November 24, 2004 December 6, 2004 $ 0.38 Cash Distribution June 30, 2004 August 5, 2004 August 19, 2004 $ 0.37 Cash Distribution March 31, 2004 May 5, 2004 May 19, 2004 $ 0.35 Cash Distribution December 31, 2003 January 31, 2004 February 13, 2004 $ 0.34 Cash Distribution September 30, 2003 November 4, 2003 November 14, 2003 $ 0.32 Cash Distribution June 30, 2003 August 4, 2003 August 14, 2003 $ 0.29 Cash Distribution March 31, 2003 May 5, 2003 May 15, 2003 $ 0.29 Cash Distribution December 31, 2002 January 31, 2003 February 14, 2003 $ 0.26 Cash Distribution September 30, 2002 October 31, 2002 November 12, 2002 $ 0.25 Cash Distribution June 30, 2002 August 13, 2002 August 15, 2002 $ 0.11 Cash Distribution

* For all periods presented, all references to the distribution amounts have been adjusted to give the effect for the unit split.