Year	Percent
1990	10.414
1991	10.562
1992	10.685
1993	10.687
1994	10.636
1995	10.824
1996	10.958
1997	11.333
1998	11.519
1999	11.498
2000	11.873
2001	12.247
2002	12.151
2003	12.108
2004	13.04
2005	13.702
2006	14.313
2007	14.873
2008	15.267
2009	15.238
2010	13.965
2011	14
2012	14.05
2013	14.12
2014	13.974
2015	13.75
2016	12.993
2017	13.185
2018	13.378
2019	13.571
2020	13.763
2021	13.956
2022	14.149
2023	14.341
2024	14.534
2025	14.727
2026	14.919
2027	15.112
2028	15.305
2029	15.497
2030	15.69