Quarter Percentage of GDP 2008-01-01 67.1 2008-04-01 65.2 2008-07-01 61.5 2008-10-01 60.3 2009-01-01 60.6 2009-04-01 65.3 2009-07-01 68.2 2009-10-01 66.9 2010-01-01 64.0 2010-04-01 61.7 2010-07-01 63.9 2010-10-01 63.4 2011-01-01 63.3 2011-04-01 62.2 2011-07-01 59.0 2011-10-01 58.1 2012-01-01 57.9 2012-04-01 57.3 2012-07-01 58.7 2012-10-01 58.5 2013-01-01 57.3 2013-04-01 57.0 2013-07-01 58.0 2013-10-01 58.0 2014-01-01 57.8 2014-04-01 58.1 2014-07-01 55.9 2014-10-01 55.0 2015-01-01 53.9 2015-04-01 56.0 2015-07-01 56.6 2015-10-01 57.1 2016-01-01 58.8 2016-04-01 59.1 2016-07-01 59.7 2016-10-01 57.9 2017-01-01 58.8 2017-04-01 60.2 2017-07-01 60.9 2017-10-01 61.0 2018-01-01 60.8