Year	Percent
1980	1.174
1981	1.202
1982	1.199
1983	1.164
1984	1.185
1985	1.207
1986	1.195
1987	1.206
1988	1.204
1989	1.215
1990	1.185
1991	1.145
1992	1.055
1993	1.075
1994	1.095
1995	1.086
1996	1.091
1997	1.095
1998	1.117
1999	1.127
2000	1.108
2001	1.11
2002	1.124
2003	1.109
2004	1.099
2005	1.079
2006	1.053
2007	1.042
2008	1.04
2009	1.064
2010	1.035
2011	1.021
2012	1.028
2013	1.016
2014	1.008
2015	0.999
2016	0.995
2017	0.982
2018	0.975
2019	0.964
2020	0.957
2021	0.949
2022	0.941
2023	0.932
2024	0.923