Year	%
1990	49.42338
1993	48.94778
1994	49.84445
1997	45.62711
1998	26.51629
2000	19.57945
2001	19.70298
2003	22.68295
2004	22.46105
2005	22.93285
2006	22.17657
2007	21.09381
2008	22.08434
2009	44.34329
2010	21.15235
2011	43.16734
2012	20.00063
2014	41.07407
2015	17.21753
2017	37.76966
2018	21.11616
2019	21.84663
2020	20.04722
2021	0.3712837