Sort:  

tradition, fun, friends are going...

for example here about 50% of people who ever go to a church service go only one day a year - at Christmas. They don't believe in the christian God, they don't identify with the religion as your measurement was, but they still are aware they do a religious thing.

btw:

the first thing to be lost will be culture and morals!

That is completely Bullshit. A certain culture will be "lost", to be replaced with something else, yes. But morals? LOL!!
Religion is preventing people from being moral. Because instead of thinking what they are doing and doing it according to moral, they just follow whatever religious instance tells them.

And yes, this has been proven by (Oh My God!!) Science.