Year	Percent
1960-01-01	75.3039292306190
1961-01-01	91.2433736325652
1962-01-01	89.1766618881429
1963-01-01	77.5858086463249
1964-01-01	64.0667119968865
1965-01-01	55.9763949829539
1966-01-01	68.0896259578026
1967-01-01	68.1581144750828
1968-01-01	75.6079679476618
1969-01-01	68.6954051370884
1970-01-01	88.3514108284334
1971-01-01	81.2193697349187
1972-01-01	105.2917711924990
1973-01-01	114.4101861392770
1974-01-01	112.9784300031000
1975-01-01	108.2830307068580
1976-01-01	111.4868202931060
1977-01-01	157.8579761072110
1978-01-01	166.3361038000310
1979-01-01	208.9798567172530
1980-01-01	132.6211648956580
1981-01-01	93.3607009440021
1982-01-01	99.3986480536341
1983-01-01	122.2705009861500
1984-01-01	109.7524111273730
1985-01-01	151.1292201299650
1986-01-01	147.9372058435190
1987-01-01	142.2093482169880
1988-01-01	118.0835545521420
1989-01-01	122.3842598987090
1990-01-01	128.8500969691730
1991-01-01	124.9707527844690
1992-01-01	120.9122037988270
1993-01-01	120.9823361514820
1994-01-01	107.6016302240560
1995-01-01	94.8829076417159
1996-01-01	96.9272160426228
1997-01-01	96.1144580132526
1998-01-01	90.8633507536502
1999-01-01	100.4902552148890
2000-01-01	102.3638096033880
2001-01-01	108.5234892569990
2002-01-01	112.5552418379480
2003-01-01	107.8775063744590
2004-01-01	97.2780929688409
2005-01-01	94.9103391407590
2006-01-01	86.2457154996964
2007-01-01	87.6767959570171
2008-01-01	91.5449606706492
2009-01-01	97.5823100447849
2010-01-01	109.9502104480030
2011-01-01	106.2042864288520
2012-01-01	95.8792033851950
2013-01-01	92.9117207607605
2014-01-01	91.7539041857700
2015-01-01	95.9188378645555
2016-01-01	102.4000940168590
2017-01-01	107.2588050545710