GDP

YD

C

IPlanned

AEPlanned

lUnplanned

(billions of dollars)

$0           

$0           

$100           

$300           

?

?

400           

400           

400           

300           

?

?

800           

800           

700           

300           

?

?

1,200           

1,200           

1,000           

300           

?

?

1,600           

1,600           

1,300           

300           

?

?

2,000           

2,000           

1,600           

300           

?

?

2,400           

2,400           

1,900           

300           

?

?

2,800           

2,800           

2,200           

300           

?

?

3,200           

3,200           

2,500           

300           

?

?