1. States that have legalized same-sex marriage.
In 2013, Rhode Island, Delaware, Minnesota, New Jersey, Hawaii, and Illinois legalized same-sex marriage, and a Supreme Court ruling on Proposition 8 made same-sex marriage legal in California.
2. The implementation of the Affordable Care Act in its first month.
In the first month of the Affordable Care Act, 19 states enrolled less than 1,000 people. In North Dakota, only 42 people enrolled.
3. National Parks that were opened during the federal government shutdown because states paid for them.
The federal government shutdown meant the temporary closure of the National Parks system. Arizona, Colorado, New York, South Dakota, and Utah spent state money to reopen some of the parks in their state, however.
4. The best-selling vehicles in each state.
Business Insider published a map in November of the best-selling vehicles in each state according to Kelley Blue Book. See the full data here.
5. What people call a sweetened carbonated beverage.
North Carolina State University Ph.D. student Joshua Katz published a series of maps that showed how Americans pronounced words. See the full series here.
6. Where large concentrations of people speak Spanish at home.
The Census Bureau published a series of maps in August that showed where large concentrations of people who speak languages other than English at home live. See the full series here.
7. Franchise Blockbuster locations that could remain open after DISH closes all remaining corporate locations.
In November, DISH announced it would close all its Blockbuster locations. There are, however, franchise locations that operate independent of DISH that won’t necessarily close. See the full details here.
8. Americans’ favorite beers.
Over-the-counter hangover remedy Blowfish published a map in October of favorite beers by state, according to a survey of 5,249 Americans over the age of 21 who drink alcohol.
9. The religion of the members of the U.S. House of Representatives.
BuzzFeed mapped out the religion of all 435 members of the House. See the full breakdown here.
10. The percentage of state population on food stamps.
A recession-era increase passed by Congress in 2009 expired in November. Read more about what the cut in benefits means for the nearly 5 million Americans enrolled here.
11. What the United States would look like if everyone who wanted to start their own state got their way.
This year, counties in northern California and northeastern Colorado voted to start their own state. They aren’t the first to try. See a list of other would-be 51st states here.
12. The most critically acclaimed popular musicians from each state.
BuzzFeed mapped out the most critically acclaimed popular musicians from each state in July, according to data from Acclaimed Music. See the full list here.
13. What the internet thinks about each state.
A map of what Google autosuggests when you type in a state was published by Matt Shirley in February.
14. The percentage of homes in each state that are owned with a mortgage following the housing market crash.
The U.S. Census Bureau released statistics in November about how home ownership was affected by the recession. See more data here.
15. The states with the highest percentage of residents who are unemployed.
TopMastersInHealthCare.com published a series of maps in September of where bad things happen. Nevada was the top state, with 9.6% of residents unemployed. See the full series here.
16. How many planes were in the air the day before Thanksgiving.
17. The most popular websites.
Bitly introduced a real-time map of the most popular media organizations in each state according to users who share links using its service. This is what the map looks like on Dec. 3, 2013. See more real-time data here.
18. The most prevalent pizza chains.
Flowing Data published a map in October of the nearest pizza chains in an area’s 10-mile radius. See the full data here.
19. Which states swear the most.
Marchex Institute published a map in December of which states swear the most according to more than 600,000 phone calls this year placed by consumers to businesses. See more data here.
20. Where the National Hockey League would relocate if Nate Silver were in charge.
21. How many meth labs are in each county.
There have been nearly 84,000 meth lab seizures since 2004, according to the Drug Enforcement Administration, but it’s estimated as few as 5% of them are ever actually discovered by authorities. Read more about homes used as meth labs here.
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