Name the type of interval shown in the graph below. 
Definitions:
Native Speaker
An individual who speaks a particular language as their first language from childhood.
German Heritage
Refers to the cultural and historical legacy derived from the people, traditions, and artifacts of Germany.
CNN News
An American news-based pay television channel known for its 24-hour news coverage.
Ethnolinguistic Majority
The dominant language-speaking group within a society, often possessing a significant influence over national culture and policy.
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