I don’t disagree with you.
However, the chart is misleading by not indicating the month when the 2007 chart started. At first glance it looks like all colored lines would start at the beginning of the year.
There’s no way to tell from the chart how many months of the 2007 line are Bush, and how many are Obama. The figures you have may come from another chart or publication, but are not crystal clear on this chart.
That’s all I’m saying.
The chart is by month at the bottom. For the 2007 graph it has 38 months, since it is still ongoing that means it covers to now or at least last month (maybe Jan). Back up 38 months and that is at the 2007. one year of Bush and all of O.