STATISTICS ON PRAYER
Barna research says slightly more than four out of five adults in the U.S. (84%) claim they had prayed in the past week. That has been the case since Barna began tracking the frequency of prayer in 1993. A Newsweek poll titled "Is God Listening?" indicated that, of those who pray, 87% believed that God answers their prayers at least some of the time. Even so, unanswered prayers did not deter them from praying. 85% insisted that they could accept God's failure to grant their prayers. Only 13% declared they have lost faith because their prayers went unanswered. 54% say that when God doesn't answer their prayers, it means it wasn't God's will to answer.
The things people pray for include health, safety, jobs, and even success, valid or not. 82% said they ask for health or success for a child or family member when they pray. 82% believed that God does not play favorites in answering prayers. 79% said God answers prayer for healing someone with an incurable disease. 75% asked for strength to overcome personal weakness. 73% answered that prayers for help in finding a job are answered. On the lighter side, 51% agreed that God doesn't answer prayers to win sporting events. 36% have never prayed for financial or career success.
(http://www.churchleaders.com/pastors/pastor-articles/150915-us-statistics-on-prayer.html)