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Questions below are based on the following information. Read the passage and answer each question based on information stated or implied in the passage.
The following passage is an excerpt from The Galápagos: A Natural Laboratory for the Earth Sciences Evidence from Volcanic History and Geomorphology Cumulative number of eruptions reported from the western Galápagos.
Human inhabitation and visitation increased dramatically in the mid-20th century. The eruption rate since 1950 has been approximately one eruption every two years.
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