According to the Los Angeles Times:
For the first time, a majority of Americans are living in a state that allows gay marriage. After a year of cascading court opinions tossing out many remaining restrictions, the dynamic in 2014 changed from how many states allow same-sex marriage to how many states don’t.
Now, at the end of the year, same-sex marriage is legally approved in 35 states and the District of Columbia, and court reviews are pending in many others.