Year	%
1989	76.89085
1991	76.29615
1993	83.31068
1995	55.37928
1999	69.27406
2000	45.41104
2001	37.85502
2003	34.88915
2004	23.76081
2005	29.46375
2006	30.05212
2007	35.09159
2008	35.18996
2009	35.37435
2010	34.76889
2011	36.92604
2013	47.53984
2014	27.52091
2015	27.78615
2021	33.94506