Lol. I thought the younger generations have more atheists than the old ones. Weird.
I think the survey is skewed because it is worldwide. If you did the survey only in Western Europe, then you'd I assume see much higher rates of atheism (actually Marxism which is a religion) amongst the youth.
I forgot to put in the source for the table above.
The data table above comes from a large 2009 pew research survey and is US only.
The source is here:
http://www.people-press.org/2009/07/09/section-4-scientists-politics-and-religion/
The news article I linked earlier talks about a global survey but I did not have time to track down the source material so I do not know what the totals are worldwide.
Edit:
Here is a summary of the global survey by country.
http://www.rdmag.com/article/2015/12/how-do-scientists-view-religion
Quote
Belief in a higher power among scientists varied depending on region. Turkey, India and Taiwan boasted the highest percentages, with 85%, 79% and 74% expressing at least some belief in a Higher Power. In Italy and Hong Kong, the percentages were 57% and 54%. The U.S. and U.K. were 36% and 35%. French scientists expressed the lowest levels of belief with 24%.