Year	%
1988	61.59039
1989	63.19218
1990	64.23174
1992	75.18896
1995	31.71656
1996	49.50355
1997	49.56907
1998	49.56907
1999	59.17041
2000	58.8764
2001	56.8828
2002	52.6004
2003	56.17406
2005	32.85297
2006	33.3943
2008	33.74732
2009	33.671
2010	35.28494
2011	35.94498
2013	37.30993
2014	43.26121
2015	34.26808
2016	36.81343
2020	41.5232
2021	41.60345