Christianity by country
According to Christian Today, there were 2.4 billion Christians around the world in 2015. And according to a 2012 Pew Research Center survey, if current trends continue, Christianity will remain the world's largest religion by year 2050. By 2050, the Christian population is expected to exceed 3 billion. Many charismatic movements are growing in Africa, Latin America, Muslim world, and Asia.Other religions:
Christianity in Kuwait
Christianity in Kuwait is a minority religion, accounting for 18%-20% of the country's population, or 650,000 - 750,000 people. Kuwait's Christians can be divided into 2 groups. The first group are Christians who are native Kuwaitis numbering approximately between 200 and 400 people. The second group, who make up the majority of Christians in Kuwait, are expatriates from various countries around the world. 
There are also a number of believers in Christ from a Muslim background in the country, though many are not citizens. A 2015 study estimates some 350 such Christians in the country that are ex Muslim.