| Date?? ???? ???????? |
??????? ????? ???Changes |
| May 18, 2012????????? |
?????????-0.5 of a percentage point |
| February 24, 2012????????? |
?????????-0.5 of a percentage point |
| December 5, 2011????????? |
?????????-0.5 of a percentage point |
| June 20, 2011????????? |
?????????+0.5 of a percentage point |
| May 18, 2011????????? |
?????????+0.5 of a percentage point |
| April 21, 2011????????? |
?????????+0.5 of a percentage point |
| March 25, 2011????????? |
?????????+0.5 of a percentage point |
| February 24, 2011????????? |
?????????+0.5 of a percentage point |
| January 20, 2011????????? |
?????????+0.5 of a percentage point |
| December 20, 2010????????? |
?????????+0.5 of a percentage point? |
| November 29, 2010????????? |
?????????+0.5 of a percentage point |
| November 29, 2010????????? |
?????????+0.5 of a percentage point |
| May 10, 2010????????? |
?????????+0.5 of a percentage point |
| February 25, 2010????????? |
?????????+0.5 of a percentage point |
| January 18, 2010????????? |
?????????+0.5 of a percentage point |