[Beautiful Disaster]

A lot of church numbers have declined because of things previously mentioned:
People's lifestyles a lot busier nowadays and a lot more happens on Sunday morning - sport competitions, jobs, family visits etc - making it harder for people to commit.
Once people get out of the habit of going, they can find it hard to get back into the swing of it so just stop instead.
Some people go through things that unfortunately either turns them away from God or they can't face up to it, so avoid church.
Some find it too boring - but that depends where you attend.
Young people's parents have a big part to play as well, depending on what they believe and whether they are willing to go to church or not, or at least get up to take their child/teenager.

Hope that has helped a bit!

Take care,
Anna.