The beginning of the chart says 2007. So all of 2007 and 2008 are Bush years, i.e., 24 months of it are Bush years...
No the chart does not start at the start of 2007 it start at the peak emplyment of 2007 and the charts the drop. Peak employment for 2007 was at the end. The chart plots the drop from the start of the drop for the periods being monitored. It covers the end of Bush and all of O.