| january 2011 - december 2010 |
-0.20 % |
|
january 2011 - january 2010 |
1.70 % |
| february 2011 - january 2011 |
0.88 % |
|
february 2011 - february 2010 |
2.19 % |
| march 2011 - february 2011 |
0.88 % |
|
march 2011 - march 2010 |
2.98 % |
| april 2011 - march 2011 |
0.39 % |
|
april 2011 - april 2010 |
3.18 % |
| may 2011 - april 2011 |
0.10 % |
|
may 2011 - may 2010 |
2.67 % |
| june 2011 - may 2011 |
-0.10 % |
|
june 2011 - june 2010 |
2.67 % |
| july 2011 - june 2011 |
0.00 % |
|
july 2011 - july 2010 |
2.67 % |
| august 2011 - july 2011 |
0.19 % |
|
august 2011 - august 2010 |
2.16 % |
| september 2011 - august 2011 |
0.29 % |
|
september 2011 - september 2010 |
2.55 % |
| october 2011 - september 2011 |
0.29 % |
|
october 2011 - october 2010 |
2.85 % |
| november 2011 - october 2011 |
0.00 % |
|
november 2011 - november 2010 |
2.95 % |
| december 2011 - november 2011 |
-0.29 % |
|
december 2011 - december 2010 |
2.45 % |