- 2005 = 15%
- 2006 = 16.5%
- 2007 = 19%
- 2008 = 25%
- 2009 = 35%
- 2010 = 24.5%
- 2011 = 24%
- 2012 = 26.5%
- 2013 = 26%
Note: Values are estimates based on the graph.
Note: Multifamily units refer to all units in residential buildings with units built one of top of another and those built side by side that do not share a ground-to-roof wall and/or common facilities like an attic, basement, heating plant or plumbing. These units do not include semi-detached (i.e. with a ground-to-roof wall), row houses or townhouses.
Source: Calculated from: U.S. Census Bureau data (2005-2013). Tables: "Number of Stories in New Single-Family Houses Completed" and "Number of Multifamily Units Completed by Number of Floors in Building". Survey of Construction. Accessed at: https://www.census.gov/construction/chars/