Year	Percent
1987	28
1988	25.92593
1989	28.57143
1990	33.33333
1991	32.20339
1992	10.875
1993	18.16367
1994	32.68349
1995	16.21166
1996	12.63226
1997	20.23402
1998	25.15899
1999	24.84169
2000	22.53877
2001	23.09804
2002	20.9328
2003	19.1196
2004	18.35546
2005	18.532
2006	17.19787
2007	18.85481
2008	10.72165
2009	10.51535
2010	11.34054
2011	8.88435
2012	8.50147
2013	8.47439
2014	8.29544
2015	9.30654
2016	10.52744
2017	11.11781
2018	11.04157
2019	10.81136
2020	11.49205
2021	11.74854