Year	Percent
1990	7.308
1991	6.133
1992	6.034
1993	5.998
1994	6.315
1995	6.772
1996	5.797
1997	5.523
1998	5.72
1999	5.093
2000	4.618
2001	5.499
2002	5.406
2003	5.525
2004	5.875
2005	6.312
2006	5.739
2007	5.508
2008	6.003
2009	7.133
2010	7.766
2011	8.099
2012	10.426
2013	11.186
2014	11.882
2015	12.967
2016	14.276
2017	14.367
2018	14.457
2019	14.548
2020	14.638
2021	14.729
2022	14.819
2023	14.91
2024	15
2025	15.091
2026	15.181
2027	15.272
2028	15.363
2029	15.453
2030	15.544