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2003-03-31 20.0
2003-06-30 17.2
2003-09-30 12.4
2003-12-31 11.4
2004-03-31 9.4
2004-06-30 7.8
2004-09-30 8.0
2004-12-31 7.6
2005-03-31 7.5
2005-06-30 8.8
2005-09-30 9.7
2005-12-31 10.5
2006-03-31 11.2
2006-06-30 10.9
2006-09-30 10.0
2006-12-31 9.7
2007-03-31 10.3
2007-06-30 10.8
2007-09-30 11.2
2007-12-31 13.6
2008-03-31 13.9
2008-06-30 13.4
2008-09-30 14.4
2008-12-31 12.1
2009-03-31 11.7
2009-06-30 14.5
2009-09-30 15.2
2009-12-31 14.5
2010-03-31 15.4
2010-06-30 19.2
2010-09-30 27.4
2010-12-31 38.2
2011-03-31 40.7
2011-06-30 37.4
2011-09-30 27.4
2011-12-31 17.2
2012-03-31 15.8
2012-06-30 15.5
2012-09-30 19.7
2013-09-30 23.7
2013-12-31 29.4
2014-03-31 31.8
2014-06-30 30.7
2014-09-30 32.7
2014-12-31 38.7
2015-03-31 54.8
2015-06-30 59.9