Year	Percent
1990	72.984
1991	72.959
1992	73.53
1993	73.895
1994	74.026
1995	73.999
1996	74.486
1997	75.012
1998	75.179
1999	75.954
2000	76.163
2001	76.291
2002	76.646
2003	76.566
2004	76.779
2005	77.297
2006	77.584
2007	77.548
2008	78.2
2009	78.59
2010	78.574
2011	79.043
2012	79.232
2013	79.504
2014	79.925
2015	79.846
2016	80.108
2017	80.283
2018	80.457
2019	80.632
2020	80.81
2021	80.991
2022	81.173
2023	81.356
2024	81.542
2025	81.731
2026	81.925
2027	82.124
2028	82.325
2029	82.527
2030	82.726