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Download to excel NCSES GSS 2012 TTA 1 SAS Output
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TABLE A-1. Changes in the organizational unit listing: 2006—12

Activity 2006 2007 2008 2009 2010 2011 2012
Units at start of data collection 12,297 12,320 12,629 13,166 13,285 13,711 13,785
Units added 397 1,273 1,215 744 1,039 959 726
Units deleted 374 964 678 625 613 885 559
Units at end of data collection 12,320 12,629 13,166 13,285 13,711 13,785 13,952
Net difference 23 309 537 119 426 74 167

SOURCE: National Science Foundation, National Center for Science and Engineering Statistics, NSF-NIH Survey of Graduate Students and Postdoctorates in Science and Engineering.
Data from survey cycle FY 2012, as of 01 May 2014.