Survey |
Original Release Date |
Last Update* |
2020 |
September 18, 2020 |
October 30, 2020 |
2019 |
September 13, 2019 |
August 28, 2020 |
2018 |
September 14, 2018 |
August 16, 2019 |
2017 |
October 03, 2017 |
August 14, 2018 |
2016 |
September 30, 2016 |
October 06, 2017 |
2015 |
September 28, 2015 |
March 15, 2017 |
2014 |
September 29, 2014 |
September 08, 2015 |
2013 |
September 30, 2013 |
September 15, 2014 |
2012 |
October 01, 2012 |
November 18, 2013 |
2011 |
October 04, 2011 |
November 18, 2013 |
2010 |
October 07, 2010 |
November 18, 2013 |
2009 |
October 15, 2009 |
November 04, 2013 |
2008 |
October 8, 2008 |
November 04, 2013 |
2007 |
October 11, 2007 |
November 04, 2013 |
2006 |
October 13, 2006 |
November 04, 2013 |
2002 - 2005 |
November 2002 - 2005 |
November 21, 2013 |
1997 - 2001 |
December 1997 - 2001 |
November 13, 2013 |
1994 - 1996 |
December 1996 |
November 13, 2013 |
1993 and earlier |
Data is not available electronically |
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