Year	Percent
1971-01-01	88.7705104053569
1972-01-01	94.2812794586513
1973-01-01	101.8161406897770
1974-01-01	62.5965323854164
1975-01-01	71.4837769363714
1976-01-01	81.4493106467843
1977-01-01	102.9543834979160
1978-01-01	92.8280791505439
1979-01-01	85.2605270771059
1980-01-01	87.7901344129233
1981-01-01	105.7229033283720
1982-01-01	104.0580462604010
1983-01-01	142.5156252907890
1984-01-01	194.1817339211760
1985-01-01	195.6314872417290
1986-01-01	167.5964434191010
1987-01-01	173.2430764545670
1988-01-01	233.4033388206340
1989-01-01	191.8114126493140
1990-01-01	155.8248830318530
1991-01-01	153.5520008722630
1992-01-01	175.0752241658750
1993-01-01	155.9181680472720
1994-01-01	138.3068320973700
1995-01-01	93.5236678212102
1996-01-01	90.8436132110248
1997-01-01	91.3543935921138
1998-01-01	89.2186451657516
1999-01-01	97.5433481117374
2000-01-01	98.7287896691960
2001-01-01	105.4820657672170
2002-01-01	127.6441026398090
2003-01-01	151.2378572255420
2004-01-01	153.2624690989740
2005-01-01	161.6623006400770
2006-01-01	151.0075728851020
2007-01-01	134.1346650245210
2008-01-01	113.9859183660460
2009-01-01	120.6813705397090
2010-01-01	110.7907401596310
2011-01-01	112.8419567268870
2012-01-01	108.4944698751490
2013-01-01	101.2229669286730
2014-01-01	98.1765286376953
2015-01-01	113.1322546543850
2016-01-01	134.5558282237800
2017-01-01	144.8240286615080