Year	2000 = 100
1981	20.65120826
1982	22.86825406
1983	22.74954218
1984	18.08670725
1985	13.37564693
1986	15.35511517
1987	14.13514646
1988	8.755471417
1989	9.628348505
1990	14.66173879
1991	20.25708611
1992	31.67082677
1993	37.47708675
1994	38.40162791
1995	34.8311762
1996	32.24566454
1997	41.51021412
1998	55.47688223
1999	63.32098162
2000	100
2001	144.496057
2002	199.7314643
2003	145.2960575
2004	128.9306092
2005	170.8151412
2006	173.8003788
2007	227.9977293
2008	196.2403106
2009	220.6337306
2010	281.5166194
2011	254.3076083
2012	237.2364152
2013	312.3788598
2014	331.172422
2015	399.9457854
2016	450.6900866
2017	483.597417
2018	544.9564265