| Year | Net Investment | Year | Net Investment |
| 2007 | 466.2 | 2012 | 37.6 |
| 2008 | 309.8 | 2013 | 146.9 |
| 2009 | –3.8 | 2014 | –22.2 |
| 2010 | –14.6 | 2015 | 10.6 |
| 2011 | 78.6 | 2016 | 237.1 |