Year	2000 = 100
1980	30.02823939
1981	27.81397285
1982	23.81404508
1983	23.89844217
1984	21.42487813
1985	24.4833761
1986	26.82812506
1987	25.40546693
1988	35.57120869
1989	39.45073197
1990	31.39822369
1991	35.02020485
1992	43.77531771
1993	47.20962127
1994	48.79704292
1995	50.50149844
1996	55.42914274
1997	65.77598545
1998	80.95513634
1999	87.45321998
2000	100
2001	91.13062012
2002	83.52423098
2003	44.38384018
2004	34.69082702
2005	48.05161266
2006	50.41057709
2007	50.87303086
2008	51.43946129
2009	43.01712372
2010	49.75071935
2011	47.36401751
2012	46.45634997
2013	42.26872806
2014	42.09974806
2015	45.08390695
2016	46.11843474
2017	43.31674843
2018	46.58530127