Year	Percent
1990	1.746
1991	1.75
1992	0.974
1993	0.54
1994	0.69
1995	0.93
1996	0.58
1997	0.82
1998	0.97
1999	0.67
2000	0.51
2001	0.4
2002	0.35
2003	0.7
2004	0.77
2005	0.9
2006	0.68
2007	0.98
2008	0.94
2009	0.92
2010	1.07
2011	1.17
2012	1.14
2013	1.05
2014	1.22
2015	1.56
2016	1.97
2017	2.024
2018	2.078
2019	2.133
2020	2.187
2021	2.241
2022	2.295
2023	2.349
2024	2.404
2025	2.458
2026	2.512
2027	2.566
2028	2.621
2029	2.675
2030	2.729