Year	%
1990	55.2995391705069
1991	55
1992	53.8674033149171
1993	51.8987341772152
1994	48.0570975416336
1995	44.1087613293051
1996	40.4225352112676
1997	36.7279411764706
1998	33.4211296458882
1999	31.5081887069176
2000	31.024811218986
2001	31.0919427563223
2002	31.4088598402324
2003	31.8568994889268
2004	32.2861285645239
2005	32.6266015863331
2006	32.885032537961
2007	32.9259920362488
2008	32.8802927339258
2009	32.9841626137922
2010	33.1422429236833
2011	33.3524618386319
2012	33.4806141610516
2013	33.5750079965881
2014	33.7085613962615
2015	33.8645019041892
2016	33.9346660165773
2017	33.9387599847851
2018	33.9617384843982
2019	33.9656893891259
2020	33.9047788239474
2021	33.7665736217725
2022	33.5591766723842