Year	Percent
1990	23.84
1991	23.931
1992	24.109
1993	24.371
1994	24.714
1995	25.133
1996	25.537
1997	26.024
1998	26.557
1999	27.084
2000	27.571
2001	27.899
2002	28.203
2003	28.479
2004	28.73
2005	28.972
2006	29.039
2007	29.58
2008	30.128
2009	30.682
2010	31.237
2011	31.793
2012	32.354
2013	32.917
2014	33.482
2015	34.042
2016	34.597
2017	34.755
2018	34.911
2019	35.071
2020	35.237
2021	35.407
2022	35.582
2023	35.762
2024	35.941
2025	36.118
2026	36.29
2027	36.461
2028	36.631
2029	36.802
2030	36.976