The Millennials God

[muriel_volestrangler]

34. Pew doesn't make it easy to see, but we can work out changes from 2007 to 2014

They give some figures for both polls.

http://www.pewforum.org/religious-landscape-study/belief-in-god/

For all age groups, in 2007 absolutely certain belief in God 71% (absolutely of fairly 88%); in 2014 64% and 83% respectively. But I can't find a comparison for particular groups like 18-29.

For the "atheist", "nothing in particular, religion important/not important" etc. categories, we have the detailed tables: http://assets.pewresearch.org/wp-content/uploads/sites/11/2015/05/Appendix-D-Detailed-Tables.pdf

Put those numbers into a spreadsheet, and we find the 18-29 age group consists of, in each year:
overall unaffiliated 2007 22%; 2014 34%
Atheist 3%; 6%
Agnostic 4%; 7%
Nothing particular relig not important 8%; 13%
Nothing particular relig important 7%; 8%

So we see that the growth is almost entirely in the non-believing categories (Muslim grew from 0.5% to 1.4%; "other Christian" from 2.9% to 3.1%; "Unitarian and other liberal faiths" from 0.7% to 1.5%, and everything else shrank; though I'm not sure giving these figures to that accuracy is justified). The 2014 18-29 generation is less religious than the 2007 one.