I would like to talk about Christianity 
It's currently the worlds largest religion, with over 2.4 billion people.  Just about 33% of the world.
Yes, the person from this are more religious and Trustful person 
Given that they make up 33% of the population, it translates to about 158 countries.
Christian beliefs are based on the teaching of Jesus
Indeed they are.  They believe he is the Son of God and the savior of humanity.  
Christians believe in justification by faith
Justification (theology)
In Christian theology, justification is God's act of removing the guilt and penalty of sin while at the same time making a sinner righteous through Christ's atoning sacrifice.
The means of justification is an area of significant difference among Catholicism, Orthodoxy and Protestantism. Justification is often seen as being the theological fault line that divided Catholic from the Lutheran and Reformed traditions of Protestantism during the Reformation.
Broadly speaking, Catholic, Methodist and Orthodox Christians distinguish between initial justification, which in their view ordinarily
who do not belong to their group - even in a thoroughly secular (though formerly Christian) society.
Demographics.
As of the early 21st century, Christianity has approximately 2.4 billion adherents. The faith represents about a third of the world's population and is the largest religion in the world. Christians have composed about 33 percent of the world's population for around 100 years. The largest Christian denomination is the Roman Catholic Church, with 1.17 billion adherents, representing half of all Christians.
Christianity remains the dominant