Year	Current U.S. Dollars
1990-01-01	608.945163053379
1991-01-01	575.955133375153
1992-01-01	513.035943659476
1993-01-01	449.065790188734
1994-01-01	372.307810016831
1995-01-01	364.226497350785
1996-01-01	394.860121460514
1997-01-01	376.429613261100
1998-01-01	345.138131648451
1999-01-01	258.049339959105
2000-01-01	279.620523320888
2001-01-01	308.408776737328
2002-01-01	321.726538045142
2003-01-01	380.507362435481
2004-01-01	433.235118935166
2005-01-01	476.552129968975
2006-01-01	543.110702403072
2007-01-01	721.768690838857
2008-01-01	966.393627185372
2009-01-01	871.224389337854
2010-01-01	880.037775119109
2011-01-01	1123.883168062700
2012-01-01	1177.974734878480
2013-01-01	1282.437162024670
2014-01-01	1279.769782659860
2015-01-01	1121.082835107390
2016-01-01	1120.666513008480
2017-01-01	1219.824048382040