Year	Percent
1990	72.671
1991	72.689
1992	72.684
1993	72.748
1994	72.929
1995	73.241
1996	73.286
1997	73.4
1998	73.101
1999	73.258
2000	73.468
2001	73.736
2002	73.989
2003	74.288
2004	74.637
2005	75.013
2006	75.251
2007	75.518
2008	75.786
2009	76.046
2010	76.303
2011	76.474
2012	76.546
2013	76.671
2014	76.828
2015	77.025
2016	77.153
2017	77.362
2018	77.572
2019	77.782
2020	77.993
2021	78.203
2022	78.413
2023	78.621
2024	78.828
2025	79.034
2026	79.239
2027	79.443
2028	79.643
2029	79.839
2030	80.029