Detailed Data
| Date |
Rate |
| June 6, 2013 |
4.52 |
| May 9, 2013 |
4.14 |
| April 11, 2013 |
4.15 |
| March 7, 2013 |
4.29 |
| Feb. 7, 2013 |
4.12 |
| Jan. 10, 2013 |
4.04 |
| Dec. 4, 2012 |
3.84 |
| Nov. 6, 2012 |
4.00 |
| Oct. 9, 2012 |
4.09 |
| Sept. 4, 2012 |
4.10 |
| Aug. 7, 2012 |
4.28 |
| July 3, 2012 |
4.29 |
| June 5, 2012 |
4.33 |
| May 8, 2012 |
4.29 |
| April 3, 2012 |
4.58 |
| March 6, 2012 |
4.42 |
| Feb. 7, 2012 |
4.54 |
| Jan. 3, 2012 |
4.67 |
| Dec. 6, 2011 |
4.78 |
| Nov. 8, 2011 |
4.78 |
| Oct. 4, 2011 |
4.67 |
| Sept. 6, 2011 |
4.55 |
| Aug. 9, 2011 |
4.99 |
| July 5, 2011 |
5.43 |
| June 7, 2011 |
5.36 |
| May 3, 2011 |
5.48 |
| April 5, 2011 |
5.72 |
| March 8, 2011 |
5.76 |
| Feb. 8, 2011 |
5.89 |
| Jan. 4, 2011 |
5.56 |
| Dec. 7, 2010 |
5.39 |
| Nov. 9, 2010 |
4.93 |
| Oct. 5, 2010 |
4.39 |
| Sept. 1, 2010 |
4.49 |
| Aug. 20, 2010 |
4.80 |
| July 6, 2010 |
5.08 |
| June 8, 2010 |
5.16 |
| May 4, 2010 |
5.39 |
| April 6, 2010 |
5.64 |
| March 9, 2010 |
5.47 |
| Jan. 5, 2010 |
5.66 |
| Dec. 8, 2009 |
5.33 |
| Nov. 3, 2009 |
5.37 |
| Oct. 6, 2009 |
5.20 |
| Sept. 8, 2009 |
5.06 |
| Aug. 4, 2009 |
5.31 |
| July 7, 2009 |
5.16 |
| June 9, 2009 |
5.81 |
| May 5, 2009 |
5.29 |
| April 7, 2009 |
5.17 |
| March 3, 2009 |
5.53 |
| Feb. 3, 2009 |
5.63 |
| Jan. 6, 2009 |
6.59 |
| Dec. 9, 2008 |
7.11 |
| Nov. 4, 2008 |
7.66 |
| Oct. 7, 2008 |
6.50 |
| Sept. 9, 2008 |
6.49 |
| Aug. 5, 2008 |
6.91 |
| July 8, 2008 |
6.76 |
| June 3, 2008 |
6.57 |
| May 6, 2008 |
6.38 |
| April 8, 2008 |
6.26 |
| March 4, 2008 |
6.38 |
| Feb. 5, 2008 |
6.05 |
| Jan. 8, 2008 |
6.06 |
| Dec. 4, 2007 |
6.18 |
| Nov. 6, 2007 |
6.40 |
| Oct. 9, 2007 |
6.46 |
| Sept. 4, 2007 |
6.45 |
| Aug. 7, 2007 |
6.67 |
| July 3, 2007 |
6.71 |
| June 5, 2007 |
6.60 |
| April 3, 2007 |
6.21 |
| March 6, 2007 |
6.12 |
| Feb. 6, 2007 |
6.38 |
| Jan. 9, 2007 |
6.21 |
Current Rate