Number of Christians
Drops 11% in America

The number of Americans who identify as Christian has dropped more than 11% in less than 20 years.

Despite a growth of 50 million people in the United States since 1990, almost all religious denominations have lost followers in the country, according to a study by the American Religious Identification Survey.

Fifteen percent of Americans say they do not identify with any religion, up from 8% in 1990. Catholic strongholds such as New England and the Midwest have lost their clout as immigrants have moved into the areas.

States that show a sharp increase in the number of people who don't identify with a religion remain largely in the Northeast, including Vermont and New Hampshire -- coincidentally, two states that are heavily weighing marriage equality.