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Decades

• 1960s (4,286)
• 1970s (5,922)
• 1980s (6,886)
• 1990s (2,188)
• 2000s (353)

States

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• Idaho (2)
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• Texas (264)
• Vermont (83)
• Virginia (537)
• Washington (42)
• West Virginia (304)
• Wisconsin (1,003)