Massive Increase in Ethanol Production

Description:
Yearly production of Ethanol in the United States since 1980.

Data:

http://www.ethanolrfa.org/

The New York Yankees Payroll vs Everyone Else (Major League Baseball)

Description:
Major League Baseball payrolls for all teams since 1985. The New York Yankees payroll is highlighted with results defined by the shape of the point.

Data:
http://www.baseball-databank.org/

R-Bloggers Steadily Growing

Description:
Number of blogs aggregated into the R-Bloggers news site.

Data:
http://www.r-bloggers.com/

We Keep Our Vehicles Longer

Description:
Average age of passenger cars and light trucks in the United States since 1995. The gray area represents the possible variance of the trend line with 95% confidence.

Data:
https://www.polk.com/company/news/average_age_of_vehicles_reaches_record_high_according_to_polk

Are Recessions Environmentally Beneficial?

Description:
Total energy consumption in the United States by sector.  Vertical gray lines represent periods of recession.

Data:
http://www.eia.gov/totalenergy/data/annual/index.cfm#consumption

http://en.wikipedia.org/wiki/List_of_recessions_in_the_United_States