A consumer expenditure survey reports the following information on entertainment spending: 
Using 2015 as the base year, by how much does a "cost of entertainment" index increase between 2015 and 2016?
Definitions:
Sensory Division
Part of the nervous system responsible for receiving and processing sensory information from the environment.
Peripheral Nervous System
The Peripheral Nervous System consists of the nerves and ganglia outside of the brain and spinal cord, involved in transmitting information to and from the central nervous system.
Central Nervous System
The Central Nervous System consists of the brain and spinal cord, serving as the primary processing center for the entire nervous system.
Dendrites
Branch-like extensions of a neuron that receive signals from other nerve cells and are key players in neural communication.
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