Services at a reform synagogue.

Of all the major religious groups in the world, Judaism is the smallest. According to a new report from the Pew Forum on Religion and Public Life, Judaism’s 14 million Jews make up 0.2 percent of the world population. The study, which is based on analysis of more than 2,500 censuses, surveys and population registers, found that Christianity holds a comfortable lead (32% of the world’s population) over the 1.6 billion Muslims (23%) 1 billion Hindus (15%), and nearly 500 million Buddhists (7%). In third place were those who identify themselves as being unaffiliated with any religion (16.3%).

Jews have the highest median age at 36, which is 13 years older than the youngest group, Muslims, and 8 years older than the lowest median age of the global population, which is 28. This, in theory, means that Judaism has the weakest prospects for growth while Islam has the strongest.