Washington

Washington 2010 Codebook. UMTRI Transportation Data Center. January 2012.  
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Washington 2009 Codebook. UMTRI Transportation Data Center. February 2011.  
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Washington 2008 Codebook. UMTRI Transportation Data Center. March 2010.  
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Washington 2007 Codebook. UMTRI Transportation Data Center. March 2010.  
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Washington 2006 Codebook. UMTRI Transportation Data Center. March 2008.  
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Washington 2005 Codebook. UMTRI Transportation Data Center. March 2007.  
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Washington 2004 Codebook. UMTRI Transportation Data Center. March 2007.  
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Washington 2003 Codebook. UMTRI Transportation Data Center. March 2007.  
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Washington 2002 Codebook. UMTRI Transportation Data Center. March 2007.  
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Washington 1996 Codebook. UMTRI Transportation Data Center. November 1997.  
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