Year	Percent Change From Preceding Period
2004-01-01	50.46273580768750
2005-01-01	17.73679786307410
2006-01-01	52.25192220787860
2007-01-01	45.40783070843080
2008-01-01	50.34541487440840
2009-01-01	-5.69883231771647
2010-01-01	15.43266238587890
2011-01-01	28.17904722064340
2012-01-01	37.01895598085180
2013-01-01	12.62138946057240
2014-01-01	26.36062696039560
2015-01-01	29.26897693569480
2016-01-01	-9.41988042614990
2017-01-01	5.24727706535927