Year	Percent
1990	26.743
1991	26.953
1992	27.263
1993	27.667
1994	28.148
1995	28.7
1996	29.275
1997	29.925
1998	30.614
1999	31.294
2000	31.934
2001	32.393
2002	32.821
2003	33.212
2004	33.57
2005	33.911
2006	34.064
2007	34.671
2008	35.278
2009	35.888
2010	36.504
2011	37.123
2012	37.746
2013	38.375
2014	39.011
2015	39.655
2016	40.307
2017	40.444
2018	40.585
2019	40.726
2020	40.869
2021	41.012
2022	41.157
2023	41.299
2024	41.437
2025	41.568
2026	41.695
2027	41.816
2028	41.935
2029	42.056
2030	42.183