Year	2000 = 100
1981	45.58232456
1982	46.47290378
1983	41.78826176
1984	42.11915826
1985	41.19187853
1986	36.38204043
1987	38.65983958
1988	22.22659603
1989	29.18015805
1990	45.53733685
1991	50.16633616
1992	59.89256223
1993	64.75360346
1994	71.15458608
1995	74.30964572
1996	82.27720721
1997	88.85074141
1998	100.5801048
1999	104.0577737
2000	100
2001	87.72604848
2002	88.25879776
2003	91.33868056
2004	106.3781928
2005	284.1329505
2006	318.9074496
2007	392.7230888
2008	465.7563264
2009	410.7067807
2010	495.3710895
2011	645.2658715
2012	675.4372984
2013	710.8355285
2014	722.1860479
2015	666.0496049
2016	619.6070086
2017	649.3311143
2018	680.9095532