It's a fact that the average German is getting older. And there are not enough children any more to preserve our being as a nation.
That's true and unfortunately applies to most West-European nations (except France and Ireland to name two). They don't care about children - what a madness.
However, what Javacooldude noticed is another thing IMHO: in Germany (male) people enter pension with 65 years and they've plenty of time then. Since the health system has been improvment over the last decades it's no wonder you see many older people walking the parks these days. Usually the younger people have to work during daytime. ;-)
PS: The lady living next to my apartment is 96 years old and fit. She walks to the park daily. God bless her.