According to Joshua Project, only 1 percent on the world’s mission funds is aimed at unreached people groups. And less than 1 percent of these funds go to the Arab world.
Yet Islam is the fastest growing religion in the world today when marriage and births are counted, while Christianity is the fastest growing religion counting conversions and new followers of Jesus Christ. According to numbers on Joshua Projects website, there are now 1, 5 billions Muslims and 2, 3 billion Christians in the world.
Source: mnnonline.org and joshuaproject.org