Table A-1. Changes in the organizational unit listing: 2008–15

Activity 2008 2009 2010 2011 2012 2013 2014olda 2014newa 2015
Units at start of data collection 12,629 13,166 13,285 13,711 13,785 13,952 14,019 14,019 14,845
Units added 1,215 743 1,039 959 726 620 782 1,275 774
Units deleted 678 624 613 885 559 553 432 449 417
Units at end of data collection 13,166 13,285 13,711 13,785 13,952 14,019 14,369 14,845 15,202
Net difference 537 119 426 74 167 67 350 826 357