While I don't doubt the results of this survey, and having seen our village church congregation dwindle over the years, I still think quite a few people say they have 'no religion' while deep down they nourish a faint hope that God does actually exist. This 'hope' often surfaces at times of great distress such as bereavement. I've often been asked to pray for someone by a self-proclaimed 'atheist'.
I also notice many young couples quite like a church ceremony for their wedding. I'm not so cynical as to think they're merely looking for a pretty setting, as nowadays there are some stunning secular buildings available as wedding venues. Similarly, it's quite surprising to see the number of infant baptisms taking place in our church. The parents of the baby are never seen at services, but fortunately our church has no objections or barriers to the baptism of their child.
Many funerals of atheists are conducted with appropriate prayers. I've seen this myself.
I merely state these observations, as I have no problem with atheism, and have never tried to push religion down anybody's throat.