Year	%
1990	37.5789917146468
1991	37.2066577070195
1992	37.0930510228449
1993	37.1864847303444
1994	37.3821931477991
1995	37.6741457691744
1996	38.0092304961392
1997	38.3541847309963
1998	38.7012987012987
1999	39.0799344986481
2000	39.4483378930405
2001	39.7958802198213
2002	40.1142900109027
2003	40.006043208944
2004	39.5371738060069
2005	39.1946564885496
2006	38.9203124398784
2007	38.6292834890966
2008	38.4832317073171
2009	38.4481978585432
2010	38.4546237686805
2011	38.536621712242
2012	38.7238151834794
2013	38.8985786915055
2014	39.1186817256064
2015	39.3388063013091
2016	39.4048626181631
2017	39.3418018083977
2018	39.1658189216684
2019	38.9038537513917
2020	38.6177565124934
2021	38.2482056999512
2022	37.9124072617867