Year	Percent
1983	100.55252
1984	88.12604
1985	65.77302
1986	69.58614
1987	114.32698
1988	95.15264
1989	75.58661
1990	88.90176
1991	93.6861
1992	93.84833
1993	83.95773
1994	79.69311
1995	84.23434
1996	63.59707
1997	56.16116
1998	65.59313
1999	61.09943
2000	65.5172
2001	61.36543
2002	53.18105
2003	62.31213
2004	45.50827
2005	42.30429
2006	39.53793
2007	33.92212
2008	37.78081
2009	40.92387
2010	44.10378
2011	41.98854
2012	56.58837
2013	43.97348
2014	53.57537
2015	77.58621
2016	69.85178
2017	54.12045
2018	53.4121
2019	57.06476
2020	36.10563
2021	31.85365