Year	%
1990	28.23152340497
1991	30.1521777375657
1992	31.6803034470114
1993	33.119802439951
1994	34.5410853093352
1995	35.94132703469
1996	37.0636420369991
1997	37.8568823225258
1998	38.4236435305444
1999	38.8672165316227
2000	39.2443918999006
2001	39.5500522020275
2002	39.7664928115598
2003	39.9135834499213
2004	40.0040373523134
2005	40.0127716639349
2006	39.951914207567
2007	39.8315740835426
2008	39.6606289380391
2009	39.4772242520754
2010	39.2280183913266
2011	38.9422340854929
2012	38.5980042069637
2013	38.1981291974271
2014	37.7789256057556
2015	37.3438399662137
2016	36.9245496035905
2017	36.5485821340373
2018	36.1819250520032
2019	35.7520660220791
2020	35.3713143701919
2021	34.9464977198959
2022	34.5284107533438