Year	Percent
1982	127.47056
1983	132.85937
1984	132.16933
1985	124.84919
1986	126.8537
1987	129.91649
1988	123.0812
1989	116.3885
1990	100.59237
1991	94.16036
1992	76.53178
1993	67.76246
1994	61.71555
1995	57.73271
1996	56.10358
1997	58.65823
1998	60.75018
1999	65.32552
2000	76.84292
2001	75.2214
2002	73.2672
2003	70.93715
2004	65.23709
2005	57.808
2006	52.6909
2007	46.82226
2008	37.65883
2009	26.59747
2010	23.10954
2011	23.96165
2012	23.24656
2013	21.87802
2014	22.59066
2015	26.32588
2016	22.46937
2017	21.55726