Having trouble following this. Could you explain exactly what the blue and green lines represent, please?
A legend on the animation page itself might go a long way towards clarifying this.
The green line is how many coins were generated every day.
The blue line is how many coins were sent to some address in a given day and hasn't moved up to the time your cursor is over.
Both quantities are divided by 144, the average number of blocks per day.
For example, if your cursor is over July 15, 2011 and the blue line over March 15, 2011 is 100, it means there are 14400 bitcoins that were transferred on March 15, 2011 and either did not move since or moved only after July 15, 2011.