The following data give the dates of successive turning points in U.S. economic activity and the corresponding levels of real GDP at the time. 
Which of the turning points are peaks?
Definitions:
Investment
Distributing capital or resources with the goal of achieving financial gain or income.
Annually Compounded
Pertaining to the calculation and addition of interest to the principal sum once a year, affecting overall growth.
Successive Years
Consecutive years following one immediately after the other.
Missing Interest Rate
An interest rate that is not specified or known in a financial scenario, which may need to be calculated based on other given information.
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