Year	%
1996	55.17241
1999	49.15254
2000	48.36683
2001	51.47059
2002	52.76345
2003	51.80445
2005	54.21336
2006	37.69924
2007	42.15214
2010	55.82942
2011	57.0159
2012	41.14256
2013	44.86459
2014	42.97082
2015	40.14376
2016	44.62025
2019	41.83601
2020	41.49755