1. USPS first class mail deliveries:
 
Source: @WSJ   Read full article  
 
2. US postal service share of employment:
 
Source: Moody’s Analytics  
 
3. Improved productivity of corporate meetings:
 
Source: NBER, Eeagli.com   Read full article  
 
4. US federal government debt (% of GDP):
 
Source: Commerzbank Research  
 
5. Views on the US in select countries:
 
Source: Pew Research Center   Read full article  
 
6. Military spending:
 
Source: Alpine Macro  
 
7. Daily pollution levels:
 
Source: The New York Times   Read full article  
 
8. Drug positivity rates (2 charts):
 
Source: Statista  
Source: @WSJ   Read full article  

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9. Splitting each state into quadrants with equal populations:
 
Source: reddit  

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