Year	2000 = 100
1981	74
1982	69
1983	70
1984	70
1985	69
1986	74
1987	82
1988	85
1989	89
1990	96
1991	87
1992	93
1993	88
1994	87
1995	96
1996	96
1997	96
1998	97
1999	95
2000	100
2001	102.8533305
2002	101.8347812
2003	99.3509309
2004	94.620101
2005	90.11433043
2006	85.82327675
2007	81.7364266
2008	74.30576463
2009	79.47131533
2010	75.68705406
2011	69.18378949
2012	68.49882874
2013	69.1907207
2014	70.60272438
2015	72.72549883
2016	72.89238145
2017	70.68234957
2018	73.11369422