Year	2000 = 100
1980	49.57825003
1981	43.67006731
1982	38.93461992
1983	31.34520889
1984	36.11062352
1985	34.76935471
1986	39.6537437
1987	42.72146535
1988	48.48678056
1989	55.56299251
1990	53.41585759
1991	51.08067642
1992	51.11087077
1993	73.238016
1994	81.10484877
1995	93.50397409
1996	97.89344435
1997	98.66882762
1998	92.758732
1999	87.69544608
2000	100
2001	106.2662286
2002	107.0329747
2003	113.2193606
2004	126.0564013
2005	143.3011867
2006	163.2585271
2007	187.7816589
2008	199.2090716
2009	206.0150735
2010	224.9592126
2011	230.8257176
2012	257.2651121
2013	264.3081783
2014	301.1949097
2015	301.5517976
2016	274.67416
2017	311.7688929
2018	301.3837989