Year	Percent
1960-01-01	27.297992830
1961-01-01	13.394342760
1962-01-01	28.319882610
1963-01-01	23.899371070
1964-01-01	22.196585140
1965-01-01	28.625377640
1966-01-01	31.914268940
1967-01-01	29.200979300
1968-01-01	16.210163650
1969-01-01	7.574859176
1970-01-01	13.586881630
1971-01-01	34.732500300
1972-01-01	58.445885110
1973-01-01	61.249076550
1974-01-01	23.474889870
1975-01-01	182.926829300
1976-01-01	443.965517200
1977-01-01	176.001811200
1978-01-01	175.514724000
1979-01-01	159.507115600
1980-01-01	100.764370300
1981-01-01	104.476042600
1982-01-01	164.776810600
1983-01-01	343.810676300
1984-01-01	626.718592100
1985-01-01	672.180651100
1986-01-01	90.096605070
1987-01-01	131.327021000
1988-01-01	342.955110200
1989-01-01	3079.809703000
1990-01-01	2313.964663000
1991-01-01	171.671696500
1992-01-01	24.899948600
1993-01-01	10.611494100
1994-01-01	4.177347244
1995-01-01	3.376116850
1996-01-01	0.155695901
1997-01-01	0.527258257
1998-01-01	0.920336467
1999-01-01	-1.166895470
2000-01-01	-0.935939412
2001-01-01	-1.066635508
2002-01-01	25.868497870
2003-01-01	13.442849290
2004-01-01	4.415717923
2005-01-01	9.639399546
2006-01-01	10.901124530
2007-01-01	8.831412989
2008-01-01	8.584013752
2009-01-01	6.282774315
2010-01-01	10.780115430
2011-01-01	9.465686275
2012-01-01	10.030259020
2013-01-01	10.619433010