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. Author manuscript; available in PMC: 2016 Feb 11.
Published in final edited form as: Popul Dev Rev. 2014 Sep 15;40(3):447–473. doi: 10.1111/j.1728-4457.2014.00693.x

Table 1. Number of articles and field journals analyzed in two-year periods between 1999 and 2008.

Year Articles Journals
1999–2000 81 42
2001–2002 143 50
2003–2004 157 169
2005–2006 216 186
2007–2008 111 41
Total 708 488