| Year | Jan | Feb | Mar | Q1 | Apr | May | June | Q2 | July | Aug | Sept | Q3 | Oct | Nov | Dec | Q4 | 12 Mo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | -2.5 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 2009 | -8.0 | -8.0 | 6.3 | -9.9 | 5.1 | -0.3 | 5.4 | 10.4 | 0.6 | 5.6 | 1.5 | 7.8 | -1.4 | 1.9 | 0.7 | 1.2 | 8.5 |
| 2008 | -6.4 | -3.0 | 3.6 | -5.9 | 3.1 | -0.4 | -5.8 | -3.3 | -1.9 | 1.9 | -12.3 | -12.2 | -7.1 | -5.1 | 2.0 | -10.1 | -28.2 |
| 2007 | 2.3 | -1.4 | 0.1 | 1.0 | 0.0 | -0.9 | -1.5 | -2.4 | -2.1 | -1.1 | -1.3 | -4.5 | -1.8 | 0.9 | -2.6 | -3.5 | -9.2 |