Year	Percent
1982	93.017
1983	89.71205
1984	91.14696
1985	93.62425
1986	90.69027
1987	92.79666
1988	99.65445
1989	105.09182
1991	102.98175
1992	100.89286
1993	99.6645
1994	94.57149
1995	93.93596
1996	92.05882
1998	94.39054
1999	100.38539
2000	98.78815
2001	96.67663
2002	100.53318
2003	100.10331
2004	102.04712
2005	101.62845
2011	89.47138
2012	93.21469
2013	94.44688
2014	96.6057
2015	98.71094
2016	99.51365