Year	Percent
1981-01-01	101.72507295792700
1982-01-01	100.54335919485000
1983-01-01	135.02751558716700
1984-01-01	192.12200328284300
1985-01-01	225.98995895880800
1986-01-01	147.14268258451300
1987-01-01	228.33625786393000
1988-01-01	629.11319335866600
1989-01-01	1430.72506961027000
1990-01-01	2947.73306959317000
1991-01-01	432.78666352335400
1992-01-01	951.96205305281800
1993-01-01	1927.38079016026000
1994-01-01	2075.88839757325000
1995-01-01	66.00703355424810
1996-01-01	15.75766560026060
1997-01-01	6.92671251629151
1998-01-01	3.19507629280056
1999-01-01	4.85844749902668
2000-01-01	7.04414105947266
2001-01-01	6.84035902487525
2002-01-01	8.45016437708330
2003-01-01	14.71491972281470
2004-01-01	6.59718509985962
2005-01-01	6.86953720898965
2006-01-01	4.18356812896902
2007-01-01	3.64127299102654
2008-01-01	5.67859390284171
2009-01-01	4.88803479876804
2010-01-01	5.03872690108066
2011-01-01	6.63636935253204
2012-01-01	5.40355339056006
2013-01-01	6.20433594839825
2014-01-01	6.32915222712776
2015-01-01	9.02980718577490
2016-01-01	8.73912829959879
2017-01-01	3.44636783234738