Year	%
1990	49.97964
1993	49.32487
1994	50.22211
1997	46.42109
1998	28.79454
2000	22.35756
2001	22.26476
2003	24.67835
2004	24.61138
2005	24.75562
2006	23.96785
2007	23.44396
2008	24.31142
2009	46.20148
2010	24.1251
2011	45.97591
2012	23.70158
2014	43.97762
2015	20.01383
2017	42.08827
2018	25.21602
2019	25.73451
2020	25.23491
2021	1.695289