Year	%
1982	10.9200003306071
1983	11.6200003517998
1984	11.4800003475613
1985	11.0600003348456
1986	11.9000003602769
1987	10.64000032213
1988	9.380000283983
1989	10.64000032213
1990	10.64000032213
1991	12.6500000953674
1992	12.7000000476837
1993	12.6758596545235
1994	13.1467623059324
1995	12.695846968362
1996	12.2591910606266
1997	11.9825861100038
1998	12.1951114740288
1999	12.071877641383
2000	12.1715539440033
2001	11.6243803976043
2002	11.387913378312
2003	12.8219814495275
2004	11.9643907528209
2005	11.3939380792616
2006	10.8905898841823
2007	10.4385350357948
2008	10.4291009360419
2009	10.0653700920516
2010	10.9993475073677
2011	10.9144525231277
2012	10.1571966422671
2013	9.95235329417181
2014	10.0718377079627
2015	9.83508333333333
2016	9.575
2017	9.31
2018	8.976532
2019	8.61132908333333
2020	7.68383775
2021	7.39227225
2022	7.31490375
2023	6.6989575