Germany's traditional beer drinkers, in the 40-to-60 age bracket, are also becoming more health-conscious and drinking less alcohol, said Marc-Oliver Huhnholz of the German Brewers Association.

FORBES: Beer? Germans Say Nein, Danke

Many in this age group could be saving for a deposit on a home, whereas first-time buyers in the 25-to-34 age bracket could explain why that age group saw the smallest rise in take-up (24%).

BBC: Female savers 'turning to Individual Savings Accounts'

So, what if it skews toward men in the 18-34 age bracket right now?

FORBES: The Girls Of Google+: Where Are They And Why Does It Matter?

Of those in the 18-54 age bracket, labor force participation rates of veterans and nonveterans were both about 88%.

CENTERFORSECURITYPOLICY: Military service benefits civilian life

Male veteran unemployment rate was 3.7%, while male nonveteran unemployment was 4.4%, though veterans in the 18-24 age bracket had greater unemployment (likely due to age and other factors rather than available jobs).

CENTERFORSECURITYPOLICY: Military service benefits civilian life

Compared to natural pot, in fact, people going to the ER for synthetic pot use are younger: 75% of people going to the ER after synthetic pot were in the 12-19 age bracket, vs. 58% with natural pot users.

FORBES: New Marijuana Laws Take Effect In Washington State, Synthetic Pot Sends More Kids To The ER

Mercer survey backs it up: 54% of Indians are seriously considering leaving their current employer, and in the 16-24 year age bracket, that increases to 66%.

FORBES: Talent Management Is Risk Management in India