Year	%
1990	54.226211709025925
1991	52.50062089343022
1992	50.90051097965608
1993	47.082187344162925
1994	46.21538653892177
1995	45.470699833356356
1996	45.09840398527674
1997	44.558680819972544
1998	43.74579317255844
1999	42.44416004285502
2000	42.04729382788661
2001	41.23530584568196
2002	40.30151047254227
2003	39.45965809898654
2004	38.65682529971418
2005	38.13918468095331
2006	37.279094103454426
2007	36.57577911455633
2008	35.68741971270654
2009	34.870438990984105
2010	34.62842628702368
2011	34.13894463371942
2012	33.55801990429336
2013	33.19965929540874
2014	33.232385419662904
2015	32.76968298281086
2016	32.73417933942576
2017	32.524700756337324
2018	32.50521288560369
2019	32.37773276067028
2020	32.457774352449576
2021	32.44821329773852
2022	32.37700606963361