By what amount (in $ Billion) has the expenditure increased

Direction: These questions are based on the following bar graph. Read the graph and answer the questions.

By what amount (in $ Billion) has the expenditure increased over the period 1993 – 94 to 1997 – 98?

Expenditure increased = Expenditure in 1997 – 98 - Expenditure in 1993 – 94
Expenditure increased = 8800 − 5100 = 3700.