Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 2 - Summarizing and Graphing Data - 2-4 Graphs That Enlighten and Graphs That Deceive - Page 71: 10

Answer

No always true trend but general increase.

Work Step by Step

There is no trend that is always valid but the numbers seem to alternatively increase and decrease but when looking to the graph we can see that generally the numbers increased quite a lot until 2000 and then decreased slightly until 2009.
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