Year	%
1996	59.53266
1999	52.07439
2000	50.59275
2001	50.15924
2002	52.25322
2003	52.10055
2006	45.85846
2007	60.00983
2008	49.46075
2009	57.5592
2010	49.54811
2011	48.68643
2012	41.57381
2013	43.53217
2015	53.29263
2016	53.00908
2017	50.61309
2018	45.76483
2019	52.08855
2020	46.66347
2021	46.04618