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Tags: 1950s, 1960s, 1970s, 1980s, 1990s, 2000s, 2010s, line, visualization
Tags: 1950s, 1960s, 1970s, 1980s, 1990s, 2000s, 2010s, histogram, visualization
Tags: 1950s, 1960s, 1970s, 1980s, 1990s, 2000s, 2010s, bar, visualization
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