Year	Percent
1979	65.15369
1980	25.72374
1981	17.52628
1982	20.72693
1983	20.88201
1984	23.97105
1985	20.65471
1986	26.51174
1987	31.34265
1988	46.43021
1989	251.24166
1990	120.54595
1991	91.20413
1992	71.04425
1993	44.87203
1994	55.20321
1995	38.41204
1996	37.18119
1997	48.55846
1998	37.54762
1999	27.33846
2000	30.15914
2001	38.12756
2002	43.41494
2003	41.55527
2004	54.21288
2005	55.55277
2006	55.95705
2007	47.37341
2008	39.98937
2009	39.06426
2010	41.63856
2011	40.17049
2012	38.65997
2013	39.39178
2014	38.61985
2015	40.12615
2016	41.66667