The rise and taper of divorce, and divorce studies.
This is the “refined divorce rate,” or the number of divorces per 1,000 married women.* The articles trend is the number of articles (3,050 in total) listed per year in the Social Sciences Citation Index with divorce in the title.**
No real point to make here, but I was curious. I previously found divorce trends tracked the Google Books uses. I guess it’s good that academic studies about divorce also are related to the underlying trend. And the lag is in the right direction (so maybe studies about divorce aren’t causing more divorces).
* The series basically ends in 1996, when the National Center for Health Statistics stopped producing this number because too many states weren’t reporting their divorces (especially California). Then the 2008-2009 numbers are from the American Community Survey, rather than vital statistics, which seems to produce high estimates, maybe because people say they’re divorced when they’re really just separated. The NCHS numbers are from a number of different reports, from “Advance Report of Final Divorce Statistics, 1989 and 1990. Vol. 43, No. 9 Supplement. 32 pp. (PHS) 95-1120” to http://www.cdc.gov/nchs/data/mvsr/mv43_12.pdf.
** It excludes reviews, notes, letters, etc. There would be more if you included terms like “marital dissolution.”