Year	US Dollars Per Barrel
2003-01-01	-1.7542
2004-01-01	-2.3726
2005-01-01	7.8383
2006-01-01	15.2458
2007-01-01	17.2492
2008-01-01	40.4572
2009-01-01	33.1033
2010-01-01	36.8548
2011-01-01	71.0913
2012-01-01	98.1585
2013-01-01	104.2730
2014-01-01	90.1604
2015-01-01	67.5470
2016-01-01	47.7549
2017-01-01	54.2954
2018-01-01	62.0049
2019-01-01	59.2949